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November

2023

| Event Location: Henn 318 | Speaker: Ewan Wright, PhD candidate, UBC (remote)

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Abstract:

TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1Dxf3FnXZUTK7MsYFDV7Wy-Ul0NSmCpyZ/view?usp=sharing

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Add to Calendar 2023-11-01T15:00:00 2023-11-01T16:00:00 Downward spirals: a PhD on risky rocket reentries Abstract: TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1Dxf3FnXZUTK7MsYFDV7Wy-Ul0NSmCpyZ/view?usp=sharing Event Location: Henn 318

October

2023

| Event Location: HENN 318 | Speaker: Romeel Davé, University of Edinburgh

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Abstract:

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Add to Calendar 2023-10-30T16:00:00 2023-10-30T17:00:00 Five Surprising Results From the Simba Simulations Abstract: Event Location: HENN 318

October

2023

| Event Location: HENN 202 | Speaker: Carl Wieman, Stanford University

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Abstract

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Add to Calendar 2023-10-26T16:00:00 2023-10-26T17:00:00 Teaching students to think like physicists Abstract:  Event Location: HENN 202

October

2023

| Event Location: BRIM 311 | Speaker: Lindsay LeBlanc

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Title: Light-matter interactions in cold and ultracold neutral atomic gases: Applications to quantum memory and holonomic quantum operations

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Add to Calendar 2023-10-26T10:00:00 2023-10-26T11:00:00 Light-matter interactions in cold and ultracold neutral atomic gases: Applications to quantum memory and holonomic quantum operations Title: Light-matter interactions in cold and ultracold neutral atomic gases: Applications to quantum memory and holonomic quantum operations Event Location: BRIM 311

October

2023

| Event Location: HENN 318 | Speaker: Multiple speakers: students, postdocs and faculty!

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Today's astronomy colloquium slot will consist of the Astronomy Jamboree, with astronomy students, postdocs, and faculty giving 55-second 'lightning talks' with a summary of what they are working on.  If you want to see the breadth of astronomy research in the department, come and listen!

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Add to Calendar 2023-10-23T16:00:00 2023-10-23T17:00:00 Astronomy Jamboree! Today's astronomy colloquium slot will consist of the Astronomy Jamboree, with astronomy students, postdocs, and faculty giving 55-second 'lightning talks' with a summary of what they are working on.  If you want to see the breadth of astronomy research in the department, come and listen! Event Location: HENN 318

October

2023

| Event Location: *This week's talk is available via Zoom only* | Speaker: Chandralekha Singh, University of Pittsburgh

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Abstract

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Add to Calendar 2023-10-19T16:00:00 2023-10-19T17:00:00 Facilitating thinking and learning in and beyond the physics classrooms using research-based approaches Abstract:  Event Location: *This week's talk is available via Zoom only*

October

2023

| Event Location: BRIM 311 | Speaker: Marcel Franz

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Title: d-mon: an improved transmon qubit based on a cuprate Josephson junction

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Add to Calendar 2023-10-19T10:00:00 2023-10-19T11:00:00 d-mon: an improved transmon qubit based on a cuprate Josephson junction Title: d-mon: an improved transmon qubit based on a cuprate Josephson junction Event Location: BRIM 311

October

2023

| Event Location: HENN 318 | Speaker: Dr. Michael Lam (SETI Institute)

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Abstract

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Add to Calendar 2023-10-16T16:00:00 2023-10-16T17:00:00 Constructing a Pulsar Interstellar Medium Array Abstract:  Event Location: HENN 318

October

2023

| Event Location: Henn 309 | Speaker: Raelyn Sullivan, PhD candidate, UBC (in-person)

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Abstract

This presentation delves into the effects of our motion through the Universe on our observations. I will discuss the significance of this phenomenon and its relevance in cosmology, including a detailed examination of Cosmic Microwave Background (CMB) data and insights from source count studies, notably involving quasars. I will conclude by examining the broader implications of our cosmic motion. 

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Add to Calendar 2023-10-16T11:00:00 2023-10-16T12:00:00 Who’s moving anyway? Effects of our motion on astronomical measurements Abstract:  This presentation delves into the effects of our motion through the Universe on our observations. I will discuss the significance of this phenomenon and its relevance in cosmology, including a detailed examination of Cosmic Microwave Background (CMB) data and insights from source count studies, notably involving quasars. I will conclude by examining the broader implications of our cosmic motion.  Event Location: Henn 309

October

2023

| Event Location: HENN 318 | Speaker: Douglas Scott (University of British Columbia, Department of Physics & Astronomy)

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Abstract:

The cosmic neutrino background is like the cosmic microwave background, but less photon-y and more neutrino-ey.  The CNB is also less talked about than the CMB, mostly because it's nearly impossible to detect directly.  But it's different in several interesting ways that will be discussed.

Bio

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Add to Calendar 2023-10-12T16:00:00 2023-10-12T17:00:00 The Cosmic Neutrino Background Abstract: The cosmic neutrino background is like the cosmic microwave background, but less photon-y and more neutrino-ey.  The CNB is also less talked about than the CMB, mostly because it's nearly impossible to detect directly.  But it's different in several interesting ways that will be discussed. Bio:  Event Location: HENN 318

October

2023

| Event Location: QMI Brimacombe 488. | Speaker: Oguzhan Can(PhD student)

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Add to Calendar 2023-10-06T10:00:00 2023-10-06T12:00:00 Topological superconductivity in twisted cuprates and device applications inspired by their Josephson physics Event Location: QMI Brimacombe 488.

October

2023

| Event Location: HENN 202 | Speaker: *This event has been cancelled*

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*This event has been cancelled*

 

Abstract:
Queer civil rights in the USA have been hard won from direct activism and organization of a diverse coalition of people, including trans women and men, People of Color, and members of the LGBT+ community more broadly. 

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Add to Calendar 2023-10-05T16:00:00 2023-10-05T17:00:00 Cancelled: Queering Physics: A History of the Queer Rights in the USA and LGBT+ Advocacy in Physics *This event has been cancelled*   Abstract:Queer civil rights in the USA have been hard won from direct activism and organization of a diverse coalition of people, including trans women and men, People of Color, and members of the LGBT+ community more broadly.  Event Location: HENN 202

September

2023

| Event Location: HENN 202 | Speaker: Suckjoon Jun (University of California, San Diego)

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Abstract: 

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Add to Calendar 2023-09-28T16:00:00 2023-09-28T17:00:00 Growth, size, and precision control Abstract:  Event Location: HENN 202

September

2023

| Event Location: HENN 318 | Speaker: Andy Zhao

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Abstract

Supersymmetric partition functions often have interesting geometric interpretations. For example, the partition function of the 2d A-model encodes the zero-pointed Gromov Witten invariants of the target space. Such interpretations sometimes allow us to derive new identities or test existing conjectures. 

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Add to Calendar 2023-09-26T14:00:00 2023-09-26T15:00:00 Hemisphere index of 3d N=4 and enumerative geometry Abstract:  Supersymmetric partition functions often have interesting geometric interpretations. For example, the partition function of the 2d A-model encodes the zero-pointed Gromov Witten invariants of the target space. Such interpretations sometimes allow us to derive new identities or test existing conjectures.  Event Location: HENN 318

September

2023

| Event Location: Henn 318 | Speaker: Wyatt Reeves(PhD student)

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Understanding quantum chaos in conformal field theories is extremely important. Chaotic dynamics can explain why so many systems can be studied with statistical mechanics, and why systems reach ``typical’’ states so quickly. Outside of the simplest, highly symmetric systems, all systems are expected to be described by chaotic dynamics; whether and how these dynamics can appear in theories with conformal symmetry is thus essential to further our understanding of most CFTs.

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Add to Calendar 2023-09-26T10:00:00 2023-09-26T12:00:00 Quantum Chaos in Conformal Field Theories" Understanding quantum chaos in conformal field theories is extremely important. Chaotic dynamics can explain why so many systems can be studied with statistical mechanics, and why systems reach ``typical’’ states so quickly. Outside of the simplest, highly symmetric systems, all systems are expected to be described by chaotic dynamics; whether and how these dynamics can appear in theories with conformal symmetry is thus essential to further our understanding of most CFTs. Event Location: Henn 318

September

2023

| Event Location: Henn 318 | Speaker: Prof. Sergey Klimenko, University of Florida (remote)

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TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1OUNXpiVXfLfKK0drnOyUKkQzGZj6vtjc/view?usp=sharing

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Add to Calendar 2023-09-25T11:00:00 2023-09-25T12:00:00 Einstein’s Zoo: the hunt for new species TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1OUNXpiVXfLfKK0drnOyUKkQzGZj6vtjc/view?usp=sharing Event Location: Henn 318

September

2023

| Event Location: HENN 202 | Speaker: Allanah Hallas, Cindy Shaheen, Chris Hearty, Valery Milner, Allison Man/Lucas Kuhn, Chloé Malbrunot/Doug Bryman, Andrew Potter and Steve Plotkin.

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Introduction:

Our annual Research Jamboree is geared towards grad and undergrad students interested in research opportunities at PHAS. Faculty will briefly outline their research areas and student needs. Bring your questions!

Speaker list and abstracts:

1. Alannah Hallas: From structure to function in quantum materials

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Add to Calendar 2023-09-21T16:00:00 2023-09-21T17:00:00 Research Jamboree! A deep dive into diverse research fields Introduction: Our annual Research Jamboree is geared towards grad and undergrad students interested in research opportunities at PHAS. Faculty will briefly outline their research areas and student needs. Bring your questions! Speaker list and abstracts: 1. Alannah Hallas: From structure to function in quantum materials Event Location: HENN 202

September

2023

| Event Location: Henn 318 | Speaker: Gray Reid(PhD Student)

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In this thesis we present a series of studies in numerical relativity investigating stability, hyperbolicity and critical phenomena. The first part of our work is dedicated to the study of d-stars, hypothetical objects consisting of a boson star and global monopole minimally or nonminimally coupled to the general relativistic gravitational field. The space of solutions for these systems is large and, for a wide range of coupling parameters, exhibits ground state solutions with asymptotic shells of bosonic matter.

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Add to Calendar 2023-09-20T15:00:00 2023-09-20T17:00:00 Topics in Numerical Relativity In this thesis we present a series of studies in numerical relativity investigating stability, hyperbolicity and critical phenomena. The first part of our work is dedicated to the study of d-stars, hypothetical objects consisting of a boson star and global monopole minimally or nonminimally coupled to the general relativistic gravitational field. The space of solutions for these systems is large and, for a wide range of coupling parameters, exhibits ground state solutions with asymptotic shells of bosonic matter. Event Location: Henn 318

September

2023

| Event Location: HENN 202 | Speaker: Dr. Ingrid Stairs (University of British Columbia)

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About:

Precision timing of an array of millisecond radio pulsars spread across the sky can be used to look for low-frequency gravitational waves.  In June 2023, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), along with other pulsar timing array collaborations, released evidence for such gravitational waves, likely in the form of a stochastic background due to supermassive black hole binaries in the universe.  I will review the NANOGrav observational and detection methods, and discuss the implications of our find.

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Add to Calendar 2023-09-14T16:00:00 2023-09-14T17:00:00 Evidence for low-frequency gravitational waves from pulsar timing About: Precision timing of an array of millisecond radio pulsars spread across the sky can be used to look for low-frequency gravitational waves.  In June 2023, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), along with other pulsar timing array collaborations, released evidence for such gravitational waves, likely in the form of a stochastic background due to supermassive black hole binaries in the universe.  I will review the NANOGrav observational and detection methods, and discuss the implications of our find. Event Location: HENN 202

September

2023

| Event Location: Hennings 318 | Speaker: Vincent (Hong Zhe) Chen

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Abstract:

While entanglement has been examined extensively in AdS/CFT, it has avoided significant attention in the study of celestial holography and asymptotic symmetries relevant to asymptotically flat spacetime.

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Add to Calendar 2023-09-12T14:00:00 2023-09-12T15:00:00 Asymptotic entanglement and celestial holography Abstract: While entanglement has been examined extensively in AdS/CFT, it has avoided significant attention in the study of celestial holography and asymptotic symmetries relevant to asymptotically flat spacetime. Event Location: Hennings 318

September

2023

| Event Location: HENN 318 | Speaker: Dr. Anna Ordog (UBC-O and Dominion Radio Astrophysical Observatory, https://astroherzberg.org/people/anna-ordog/)

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About:

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Add to Calendar 2023-09-11T16:00:00 2023-09-11T17:00:00 The polarised radio sky at the DRAO and the quest to understand the magnetized Milky Way About: Event Location: HENN 318

September

2023

| Event Location: HENN 318 | Speaker: Prof. Prajval Shastri (Raman Research Institute, India and International Centre for Radio Astronomy Research, Australia, https://prajvalshastri.wordpress.com)

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About this Galaxy Seminar:

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Add to Calendar 2023-09-11T11:00:00 2023-09-11T12:00:00 Different Angles on Accreting Supermassive Black Holes About this Galaxy Seminar: Event Location: HENN 318

September

2023

| Event Location: Henn 318 | Speaker: Dr. Paolo Cremonese, Universitat de las Illes Balears

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Abstract:

In this talk, I will give a brief introduction on the lensing of gravitational waves, with special attention to the wave optics regime. After the introduction, I will present a method that makes use of the phase of the signal to identify and properly categorize lensed merging binaries events. Finally, I will address a well-known problem in gravitational lensing, the Mass-Sheet Degeneracy and I will show how this could affect parameter estimation for lensed events.

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Add to Calendar 2023-09-07T11:00:00 2023-09-07T12:00:00 Wave Optics in Gravitational Wave Lensing Abstract: In this talk, I will give a brief introduction on the lensing of gravitational waves, with special attention to the wave optics regime. After the introduction, I will present a method that makes use of the phase of the signal to identify and properly categorize lensed merging binaries events. Finally, I will address a well-known problem in gravitational lensing, the Mass-Sheet Degeneracy and I will show how this could affect parameter estimation for lensed events. Event Location: Henn 318

August

2023

| Event Location: HENN 318 | Speaker: Ben Scully, PHAS summer undergraduate intern

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ASTRO Colloquia for Summer 2023

* Summer undergraduate student talk will be ~20-30 minutes including Q&A

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Add to Calendar 2023-08-21T15:00:00 2023-08-21T16:00:00 Semi-supervised clustering of LIGO-VIRGO signals to improve GSpyNetTree classification ASTRO Colloquia for Summer 2023 * Summer undergraduate student talk will be ~20-30 minutes including Q&A Event Location: HENN 318

August

2023

| Event Location: HENN 318 | Speaker: Martes Wong, PHAS summer undergraduate intern; Mercedes Thompson PHAS MSc. student

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Martes will be speaking on: "Looking into the void: Spectral Analysis of Intracluster Light using MUSE"

Mercedes will be speaking on: "Breaking the Third Dimension: Outflow Proprieties of a Triply Lensed Quiescent Galaxy at z ~ 1.6"

* Summer undergraduate student talks will be ~20-30 minutes including Q&A

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Add to Calendar 2023-08-14T15:00:00 2023-08-14T16:00:00 ASTRO Colloquia for Summer 2023 Martes will be speaking on: "Looking into the void: Spectral Analysis of Intracluster Light using MUSE" Mercedes will be speaking on: "Breaking the Third Dimension: Outflow Proprieties of a Triply Lensed Quiescent Galaxy at z ~ 1.6" * Summer undergraduate student talks will be ~20-30 minutes including Q&A Event Location: HENN 318

August

2023

| Event Location: Henn 318 | Speaker: Conor Waterfield(MSc student)

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Abstract: Stochastic gravity opens up the ability to study problems where quantum fluctuations are important in semiclassical gravity. Many of these problems require regularization techniques which may break certain symmetries. In this thesis, the effects of fluctuating spacetime on geodesics is studied in the framework of interacting quantum field theories and in studying geodesic deviation. The possibility of using Pauli-Villars to regularize quantum fields in stochastic gravity calculations is explored.

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Add to Calendar 2023-08-08T14:00:00 2023-08-08T15:00:00 Geodesic Scattering and Lorentz Invariance in Stochastic Gravity Abstract: Stochastic gravity opens up the ability to study problems where quantum fluctuations are important in semiclassical gravity. Many of these problems require regularization techniques which may break certain symmetries. In this thesis, the effects of fluctuating spacetime on geodesics is studied in the framework of interacting quantum field theories and in studying geodesic deviation. The possibility of using Pauli-Villars to regularize quantum fields in stochastic gravity calculations is explored. Event Location: Henn 318

July

2023

| Event Location: HENN 318 | Speaker: Vaidehi Gupta, PHAS summer undergraduate intern; Harshini Paranjape, PHAS summer undergraduate intern

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Vaidehi will be speaking on: "Identification of Protocluster memebers near SDP17"

Harshini will be speaking on: "Updating the LIGO auxiliary channel list with the noise score"

 

* Summer undergraduate student talks will be ~20-30 minutes including Q&A

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Add to Calendar 2023-07-31T15:00:00 2023-07-31T16:00:00 ASTRO Colloquia for Summer 2023 Vaidehi will be speaking on: "Identification of Protocluster memebers near SDP17" Harshini will be speaking on: "Updating the LIGO auxiliary channel list with the noise score"   * Summer undergraduate student talks will be ~20-30 minutes including Q&A Event Location: HENN 318

July

2023

| Event Location: https://ubc.zoom.us/j/67853605007?pwd=Y0JrQkZJdlFvb0NRc29PcWVBdWsvdz09 | Speaker: Eleni (Marilena) Lykiardopoulou (PhD student)

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Experimental investigations of nuclear structure provide a probe to study the strong nuclear force, many properties of which still remain unknown. One powerful way to experimentally investigate nuclear structure is through the mass of the atomic nucleus, as it reveals the binding energy of the nucleus.

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Add to Calendar 2023-07-28T09:00:00 2023-07-28T12:00:00 Resurrecting the N = 20 island of inversion and upgrades to the TITAN measurement Penning trap Experimental investigations of nuclear structure provide a probe to study the strong nuclear force, many properties of which still remain unknown. One powerful way to experimentally investigate nuclear structure is through the mass of the atomic nucleus, as it reveals the binding energy of the nucleus. Event Location: https://ubc.zoom.us/j/67853605007?pwd=Y0JrQkZJdlFvb0NRc29PcWVBdWsvdz09

July

2023

| Event Location: HENN 318 | Speaker: James Burgoyne, PHAS M.Sc. student

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James Burgoyne will be speaking on: "Unveiling the transient evolution of a galaxy through a hyper-luminous quasar, Q2343+125 at z=2.577"

 

* Each graduating MSc student talk will be 30 minutes including Q&A

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Add to Calendar 2023-07-24T15:00:00 2023-07-24T16:00:00 ASTRO Colloquia for Summer 2023 James Burgoyne will be speaking on: "Unveiling the transient evolution of a galaxy through a hyper-luminous quasar, Q2343+125 at z=2.577"   * Each graduating MSc student talk will be 30 minutes including Q&A Event Location: HENN 318

July

2023

| Event Location: Hennings Building - Room 318 | Speaker: Bill Unruh

Since Bohr set out his interpretation of Quantum Mechanics which
separated small quantum systems from classical measuring systems, the question
as to whether or not there was a physical division between the quantum and the
classical. Is there some criterion which divides the world into quantum bits
and classical bits? Experiments are not answering the question. In particular
I will argue that the 40Kg mirrors of Ligo have already been shown to be
quantum by showing that that the quantum noise of Ligo arises from an

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Add to Calendar 2023-07-18T10:00:00 2023-07-18T11:00:00 Ligo is Quantum Since Bohr set out his interpretation of Quantum Mechanics which separated small quantum systems from classical measuring systems, the question as to whether or not there was a physical division between the quantum and the classical. Is there some criterion which divides the world into quantum bits and classical bits? Experiments are not answering the question. In particular I will argue that the 40Kg mirrors of Ligo have already been shown to be quantum by showing that that the quantum noise of Ligo arises from an Event Location: Hennings Building - Room 318

July

2023

| Event Location: HENN 318 | Speaker: Dhatri Raghunathan, PHAS summer undergraduate intern

Related Upcoming Events:

Astro Colloquia for Summer 2023

* Summer undergraduate student talk will be ~20-30 minutes including Q&A

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Add to Calendar 2023-07-17T15:00:00 2023-07-17T16:00:00 Improving the performance of GSpyNetTree during LIGO-Virgo observing run 4 Astro Colloquia for Summer 2023 * Summer undergraduate student talk will be ~20-30 minutes including Q&A Event Location: HENN 318

July

2023

| Event Location: https://ubc.zoom.us/j/66513543864?pwd=RXVQSFRFNTZINmMrZ3RJUXhHNHJXQT09 | Speaker: Luke Reynolds (PhD student)

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MRI-based assessments of the human brain are critical for research, diagnosis and treatment of neurological disorders. Future clinical practice will demand accurate and consistent quantitative methodology alongside today’s qualitative image evaluations. Consequently, MRI research focuses on developing physical understanding of prevalent techniques and establishing new methods for efficient quantitative analysis. The brain’s complex structure complicates this goal.

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Add to Calendar 2023-07-10T09:00:00 2023-07-10T11:00:00 Longitudinal Relaxation Dynamics in White Matter: Experiments in NMR and MRI MRI-based assessments of the human brain are critical for research, diagnosis and treatment of neurological disorders. Future clinical practice will demand accurate and consistent quantitative methodology alongside today’s qualitative image evaluations. Consequently, MRI research focuses on developing physical understanding of prevalent techniques and establishing new methods for efficient quantitative analysis. The brain’s complex structure complicates this goal. Event Location: https://ubc.zoom.us/j/66513543864?pwd=RXVQSFRFNTZINmMrZ3RJUXhHNHJXQT09

July

2023

| Event Location: HENN Rooms 200 and 201 | Speaker: Fredrik Höök (Department of Physics, Chalmers University of Technology in Sweden)

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Frontiers in Biophysics (FiB) 2023 is an annual one-day conference in the Pacific Northwest covering all areas of quantitative biology and biophysics. FiB is a unique environment that brings together a wide variety of scientific disciplines and individuals from all experience levels to learn, present, and discuss biophysics research for the day, followed by a social event in the evening!

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Add to Calendar 2023-07-07T09:00:00 2023-07-07T17:00:00 Frontiers in Biophysics Conference 2023 Frontiers in Biophysics (FiB) 2023 is an annual one-day conference in the Pacific Northwest covering all areas of quantitative biology and biophysics. FiB is a unique environment that brings together a wide variety of scientific disciplines and individuals from all experience levels to learn, present, and discuss biophysics research for the day, followed by a social event in the evening! Event Location: HENN Rooms 200 and 201

June

2023

| Event Location: HENN 318 | Speaker: Ryan Jackim (Master's student)

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Abstract:

Abstract: We present a catalogue of white dwarf candidates constructed from the GALEX and Gaia EDR3 catalogues.

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Add to Calendar 2023-06-19T11:00:00 2023-06-19T14:00:00 The GALEX-Gaia-EDR3 Catalogue of Single and Binary White Dwarfs Abstract: Abstract: We present a catalogue of white dwarf candidates constructed from the GALEX and Gaia EDR3 catalogues. Event Location: HENN 318

June

2023

| Event Location: Hennings 318 | Speaker: Shawn Hsueh(PhD student)

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My research aims to advance the development pipeline of protein and peptide therapeutics from a biophysical perspective, and covers a spectrum of contributions from methodologies to applications. For methodology contributions, I have developed an unbiased molecular dynamics (MD) simulation tool, Reservoir REMD, and integrated it into GROMACS. It has been benchmarked and shown to give the same results for different initial conformations, even when starting the simulation from a kinetically trapped initial state.

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Add to Calendar 2023-06-15T09:00:00 2023-06-15T11:00:00 A journey into computational protein design: Novel simulation methods development, physical origins of disease mutants, and therapeutic design for neurodegenerative diseases and COVID19 My research aims to advance the development pipeline of protein and peptide therapeutics from a biophysical perspective, and covers a spectrum of contributions from methodologies to applications. For methodology contributions, I have developed an unbiased molecular dynamics (MD) simulation tool, Reservoir REMD, and integrated it into GROMACS. It has been benchmarked and shown to give the same results for different initial conformations, even when starting the simulation from a kinetically trapped initial state. Event Location: Hennings 318

June

2023

| Event Location: Henn 318 | Speaker: Prof. Yanbei Chen, Caltech (remote)

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TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1VU0khsZv5zqt4ZX04xZCkKzTpluNTdwg/view?usp=sharing

Abstract:

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Add to Calendar 2023-06-12T11:00:00 2023-06-12T12:00:00 Experimentally studying general relativity and black-hole physics with gravitational-wave observations TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1VU0khsZv5zqt4ZX04xZCkKzTpluNTdwg/view?usp=sharing Abstract: Event Location: Henn 318

June

2023

| Event Location: https://ubc.zoom.us/j/61540621166?pwd=UGZDVkpiUTVmdEY5Qmtva2REVzVrQT09 | Speaker: Stepan Fomichev(PhD student)

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Motivated by the success of the momentum average (MA) approximation for the single-polaron and bipolaron cases, in this thesis we pursue the first generalization of this technique to the case of weakly-doped insulators beyond the Migdal limit. In search of a suitable starting point, we investigate the ground states of a variety of model Hamiltonians, inspired by real materials such as the rare-earth nickelates, polyacetylene, barium bismuthates, and buckminsterfullerene.

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Add to Calendar 2023-06-12T10:00:00 2023-06-12T13:00:00 Electron-phonon coupling in insulators beyond the Migdal limit Motivated by the success of the momentum average (MA) approximation for the single-polaron and bipolaron cases, in this thesis we pursue the first generalization of this technique to the case of weakly-doped insulators beyond the Migdal limit. In search of a suitable starting point, we investigate the ground states of a variety of model Hamiltonians, inspired by real materials such as the rare-earth nickelates, polyacetylene, barium bismuthates, and buckminsterfullerene. Event Location: https://ubc.zoom.us/j/61540621166?pwd=UGZDVkpiUTVmdEY5Qmtva2REVzVrQT09

June

2023

| Event Location: HENN 302 | Speaker: Paul Ripoche (PhD student)

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Abstract:

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Add to Calendar 2023-06-08T11:00:00 2023-06-08T14:00:00 Studies of Evolved Stellar Populations (From Giants to Remnants) Abstract: Event Location: HENN 302

June

2023

| Event Location: HENN 302 | Speaker: Tristan Pinsonneault-Marotte (PhD student)

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Abstract:

The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a radio telescope that we built to map the large-scale structure of the Universe between redshifts $0.8<z<2.5$, when dark energy is expected to begin the transition from a decelerating to an accelerating phase in its expansion. It was designed to perform an intensity mapping survey using the 21 cm line of neutral hydrogen, a novel method that has the potential to enable enormous surveys of the distant Universe, but also significant observational challenges to overcome.

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Add to Calendar 2023-06-01T13:00:00 2023-06-01T16:00:00 A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with the eBOSS Lyman-alpha Forest Abstract: The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a radio telescope that we built to map the large-scale structure of the Universe between redshifts $0.8&lt;z&lt;2.5$, when dark energy is expected to begin the transition from a decelerating to an accelerating phase in its expansion. It was designed to perform an intensity mapping survey using the 21 cm line of neutral hydrogen, a novel method that has the potential to enable enormous surveys of the distant Universe, but also significant observational challenges to overcome. Event Location: HENN 302

May

2023

| Event Location: https://ubc.zoom.us/j/68991164698?pwd=dzFGNVdPbSt4QldsVHNlWnJLL2ZWQT09 Passcode: 815209 | Speaker: Chris Waddell(PhD student)

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Abstract: The AdS/CFT correspondence is a far-reaching equivalence between theories of quantum gravity in spacetimes with negative cosmological constant, such as anti-de Sitter (AdS) space, and lower-dimensional, non-gravitational quantum systems, such as conformal field theories (CFTs).

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Add to Calendar 2023-05-25T15:00:00 2023-05-25T17:00:00 Title: Boundaries, Braneworlds, and Black Holes: Applications of the AdS/BCFT Correspondence Abstract: The AdS/CFT correspondence is a far-reaching equivalence between theories of quantum gravity in spacetimes with negative cosmological constant, such as anti-de Sitter (AdS) space, and lower-dimensional, non-gravitational quantum systems, such as conformal field theories (CFTs). Event Location: https://ubc.zoom.us/j/68991164698?pwd=dzFGNVdPbSt4QldsVHNlWnJLL2ZWQT09 Passcode: 815209

May

2023

| Event Location: https://ubc.zoom.us/j/62625300003?pwd=RTBNckgzbDk0aXhRR3NyUUEyaGV4UT09 | Speaker: Andrew Jacobs(PhD student)

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Abstract: Since the 1960's a general understanding of the creation of the chemical elements in the universe has existed. However, in recent decades this understanding has undergone refinement in describing the exact astrophysical mechanisms which result in the synthesis of isotopes, particularly those heavier (i.e. more protons) than iron.

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Add to Calendar 2023-05-17T12:00:00 2023-05-17T15:00:00 Refinement of the First r-process Abundance Peak Via High-Precision Mass Measurements Abstract: Since the 1960's a general understanding of the creation of the chemical elements in the universe has existed. However, in recent decades this understanding has undergone refinement in describing the exact astrophysical mechanisms which result in the synthesis of isotopes, particularly those heavier (i.e. more protons) than iron. Event Location: https://ubc.zoom.us/j/62625300003?pwd=RTBNckgzbDk0aXhRR3NyUUEyaGV4UT09

May

2023

| Event Location: Centre for Brain Health room 3402A or https://ubc.zoom.us/j/63777759360?pwd=SmFXcG84UWFJc3c0Z2Q4d2NMVHNCQT09 Passcode: 921391 | Speaker: Connor Bevington(PhD student)

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Hybrid PET/MRI scanners are becoming more common in research and clinical settings, in particular for their ability to simultaneously acquire unique functional and structural information to probe the healthy and diseased brain. Data from both modalities need to be thoroughly processed to enhance signal-to-noise ratios (SNR), and the development and optimization of analysis algorithms is required to extract meaningful physiological quantities for medical research applications.

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Add to Calendar 2023-05-10T13:00:00 2023-05-10T16:00:00 Development of advanced denoising and analysis algorithms for applications in hybrid PET/MRI brain imaging Hybrid PET/MRI scanners are becoming more common in research and clinical settings, in particular for their ability to simultaneously acquire unique functional and structural information to probe the healthy and diseased brain. Data from both modalities need to be thoroughly processed to enhance signal-to-noise ratios (SNR), and the development and optimization of analysis algorithms is required to extract meaningful physiological quantities for medical research applications. Event Location: Centre for Brain Health room 3402A or https://ubc.zoom.us/j/63777759360?pwd=SmFXcG84UWFJc3c0Z2Q4d2NMVHNCQT09 Passcode: 921391

April

2023

| Event Location: Henn 318 | Speaker: Prof. Shinji Mukohyama, Yukawa Institute for Theoretical Physics, Kyoto University

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TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1rCjcB4RkIckHq3anhXzzsKDS8QRsNW4n/view?usp=share_link

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Add to Calendar 2023-04-27T16:00:00 2023-04-27T17:00:00 Effective field theory of black hole perturbations with timelike scalar profile TALK RECORDING AVAILABLE AT:&nbsp;https://drive.google.com/file/d/1rCjcB4RkIckHq3anhXzzsKDS8QRsNW4n/view?usp=share_link Event Location: Henn 318

April

2023

| Event Location: HEBB Building, Room 116 | Speaker: Dr. Simon Viel (Carleton University)

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Abstract:

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Add to Calendar 2023-04-20T11:00:00 2023-04-20T12:00:00 Searches for new physics with noble liquids at SNOLAB Abstract: Event Location: HEBB Building, Room 116

April

2023

| Event Location: HENN 201 | Speaker: Raymond Brock (Michigan State University)

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Abstract:

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Add to Calendar 2023-04-13T16:00:00 2023-04-13T17:00:00 That Spin 0 Boson Changed Everything &nbsp; Abstract: Event Location: HENN 201

April

2023

| Event Location: AMPL 311 | Speaker: Erik Sorensen (McMaster University)

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Abstract: The bond-dependent Ising interaction present in the Kitaev model has recently attracted considerable attention. The attention has mostly focused on the two-dimensional honeycomb lattice version of the Kitaev model where several materials has been identified as potential realizations. However, one can also imagine realizing simpler one-dimensional Kitaev spin chains that still has a surprisingly rich structure.

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Add to Calendar 2023-04-13T10:00:00 2023-04-13T11:00:00 Ground State Solitons in Kitaev Spin Chains Abstract: The bond-dependent Ising interaction present in the Kitaev model has recently attracted considerable attention. The attention has mostly focused on the two-dimensional honeycomb lattice version of the Kitaev model where several materials has been identified as potential realizations. However, one can also imagine realizing simpler one-dimensional Kitaev spin chains that still has a surprisingly rich structure. Event Location: AMPL 311

April

2023

| Event Location: https://ubc.zoom.us/j/62482228932?pwd=a3RIU0xFY0wrSFYrYzNFbzc2ZXZ0dz09 Passcode: 199086 | Speaker: PhD student: Maryam Rostamzadeh

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Liver cancer is the sixth most common cancer worldwide and radiation therapy has been a non-surgical alternative for treating patients with advanced liver cancer. Dynamic tumor tracking (DTT) has been developed to treat intra-fractionally moving liver tumors with radiation therapy. However, one of the most challenging aspects of DTT is detecting the internal tumor position, which usually relies on implanted markers as a surrogate for tumor position.

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Add to Calendar 2023-04-12T13:00:00 2023-04-12T15:00:00 MARKERLESS DYNAMIC TUMOR TRACKING USING DIAPHRAGM AS A SOFT-TISSUE ANATOMICAL SURROGATE FOR LIVER TUMORS Liver cancer is the sixth most common cancer worldwide and radiation therapy has been a non-surgical alternative for treating patients with advanced liver cancer. Dynamic tumor tracking (DTT) has been developed to treat intra-fractionally moving liver tumors with radiation therapy. However, one of the most challenging aspects of DTT is detecting the internal tumor position, which usually relies on implanted markers as a surrogate for tumor position. Event Location: https://ubc.zoom.us/j/62482228932?pwd=a3RIU0xFY0wrSFYrYzNFbzc2ZXZ0dz09 Passcode: 199086

April

2023

| Event Location: HENN 201 | Speaker: Shohini Ghose (Wilfrid Laurier)

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Abstract:

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Add to Calendar 2023-04-06T16:00:00 2023-04-06T17:00:00 Hunting for quantum butterflies Abstract: Event Location: HENN 201

April

2023

| Event Location: AMPL 311 or watch online | Speaker: Leslie M. Schoop – Princeton University

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Abstract: Quantum materials are hoped to change technology in various aspects. However, most of the desired applications are hindered by the lack of suitable materials. In my group we are using concepts from chemistry to understand, predict and synthesize new quantum materials. In this talk, I will show how simple concepts, such as measuring bond distances, allow us to make predictions about electronic structures of materials, which we can then use to find new quantum materials.

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Add to Calendar 2023-04-06T10:00:00 2023-04-06T11:00:00 The Chemistry of Quantum Materials Abstract:&nbsp;Quantum materials are hoped to change technology in various aspects. However, most of the desired applications are hindered by the lack of suitable materials. In my group we are using concepts from chemistry to understand, predict and synthesize new quantum materials. In this talk, I will show how simple concepts, such as measuring bond distances, allow us to make predictions about electronic structures of materials, which we can then use to find new quantum materials. Event Location: AMPL 311 or watch online

April

2023

| Event Location: HENN 318 | Speaker: Dr. Hyoyin Gan (UBC Physics &amp; Astronomy)

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Abstract:

The detection of the 21 cm signal from the Epoch of Reionisation (EoR) is challenging due to the strong astrophysical foregrounds, radio frequency interference (RFI), and ionospheric and instrumental effects. Most if not all observations of the 21 cm signal at high redshifts show so-called “excess variance” in their power spectrum, well beyond what would be expected based on the thermal noise limit. Understanding the sources of the excess is crucial for improving upper limits on the EoR signal.

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Add to Calendar 2023-04-03T15:00:00 2023-04-03T16:00:00 Exploring excess variance in LOFAR-EoR using machine learning Abstract: The detection of the 21 cm signal from the Epoch of Reionisation (EoR) is challenging due to the strong astrophysical foregrounds, radio frequency interference (RFI), and ionospheric and instrumental effects. Most if not all observations of the 21 cm signal at high redshifts show so-called “excess variance” in their power spectrum, well beyond what would be expected based on the thermal noise limit. Understanding the sources of the excess is crucial for improving upper limits on the EoR signal. Event Location: HENN 318