Events
November
2023
| Event Location: Henn 309 | Speaker: Wyatt Reeves: PhD student for Final Defense
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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November
2023
| Event Location: McLeod 3038 | Speaker: Nitin Kaushal- QMI
Abstract: Moiré materials constructed using the transition metal dichalcogenide (TMD) bilayers have been used to simulate the Hubbard model with long range Coulomb interactions procuring the lattice Wigner crystal states at fractional fillings like n=2/3, 1/2, and 1/3. We study the gamma-valley TMD homobilayers which can give rise to the effective moire honeycomb lattices, as shown by recent ab-initio studies.
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November
2023
| Event Location: Hennings 318 | Speaker: Prof. David Kipping, Columbia University, remote. For more details, see http://davidkipping.co.uk/; http://www.youtube.com/coolworldslab
Abstract
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November
2023
| Event Location: HENN 318 | Speaker: Katelin Schutz (McGill University)
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November
2023
| Event Location: HENN 301 | Speaker: Mark Van Raamsdonk (UBC PHAS!)
Abstract:
In this talk, I'll describe how ordinary spacetime might arise from quantum physics (in what's known as the holographic approach to quantum gravity), how our universe might be related to a giant wormhole, and how this picture can lead to predictions for cosmology (such as decreasing dark energy and an eventual big crunch).
Bio:
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November
2023
| Event Location: HENN 202 | Speaker: Matt McQuinn, University of Washington
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November
2023
| Event Location: BRIM | Speaker: Jeff Sonier – Simon Fraser University
CM Seminar: CM Seminar: Jeff Sonier – Simon Fraser University
Title: Muon Studies of Superconducting UTe2
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November
2023
| Event Location: Zoom:https://ubc.zoom.us/j/66771351287?pwd=YnJNUXJ3RHVrcHBEeXk3eEJWNFNDZz09 Passcode: 530425 | Speaker: Emilie Carpentier (PhD student)
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November
2023
| Event Location: HENN 318 | Speaker: Ryan MacDonald, U. Michigan
Abstract:
JWST is now delivering ultra-precise spectra of exoplanet atmospheres over a significantly wider wavelength range than afforded by previous observations. This exceptional improvement in data quality has opened new areas of atmospheric science to observational study that were previously out of reach.
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November
2023
| Event Location: HENN 318 | Speaker: Justin Kaid, University of Washington (*in-person)
Abstract:
The common statement that any consistent quantum gravity theory contains dynamical objects with all possible charges suggests that there are still a number of hitherto-unidentified branes in string theory. In this talk I will discuss four of these new branes, focusing on heterotic string theories. The focus of the discussion will be on the relationship between these branes and the lower-dimensional vacua obtained by closed string tachyon condensation in the ten-dimensional, non-supersymmetric heterotic string theories.
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November
2023
| Event Location: BRIM 311 | Speaker: Xiaodong Xu – University of Washington
CM Seminar: Xiaodong Xu – University of Washington
Title: Observation of Fractional Quantum Anomalous Hall Effect
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November
2023
| Event Location: Hennings 318 | Speaker: Prof. Julio Parra Martinez, University of British Columbia, In-person, Blackboard-style talk (with supplemental plots)
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November
2023
| Event Location: HENN 202 | Speaker: Sarah Rauscher (University of Toronto, Mississauga)
Abstract:
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November
2023
| Event Location: Henning 318 | Speaker: Prof. Salvatore Vitale, Principal Investigator, MIT Kavli Institute for Astrophysics and Space Research, https://physics.mit.edu/faculty/salvatore-vitale/ (remote)
TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1KhUBNa57gTUUcqiO76yYEErsIPNuI9v5/view?usp=sharing
Abstract:
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November
2023
| Event Location: HENN 318 | Speaker: Marcin Sawicki, Professor and Canada Research Chair (Saint Mary’s University)
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November
2023
| Event Location: HENN 202 | Speaker: Prof. H. Tom Soh, Department of Electrical Engineering, Department of Bioengineering & the Department of Radiology at Standford University
Abstract:
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November
2023
| Event Location: HENN 202 | Speaker: Sang-Wook Cheong, Rutgers - State University of New Jersey
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November
2023
| Event Location: BRIM 311 | Speaker: Joseph Checkelsky
Title: Natural Superlattice Design of Modulated Superconductors
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November
2023
| Event Location: Henn 318 | Speaker: Ewan Wright, PhD candidate, UBC (remote)
Abstract:
TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1Dxf3FnXZUTK7MsYFDV7Wy-Ul0NSmCpyZ/view?usp=sharing
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October
2023
| Event Location: HENN 318 | Speaker: Romeel Davé, University of Edinburgh
Abstract:
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October
2023
| Event Location: HENN 202 | Speaker: Carl Wieman, Stanford University
Abstract:
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October
2023
| Event Location: BRIM 311 | Speaker: Lindsay LeBlanc
Title: Light-matter interactions in cold and ultracold neutral atomic gases: Applications to quantum memory and holonomic quantum operations
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October
2023
| Event Location: HENN 318 | Speaker: Multiple speakers: students, postdocs and faculty!
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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October
2023
| Event Location: *This week's talk is available via Zoom only* | Speaker: Chandralekha Singh, University of Pittsburgh
Abstract:
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October
2023
| Event Location: BRIM 311 | Speaker: Marcel Franz
Title: d-mon: an improved transmon qubit based on a cuprate Josephson junction
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October
2023
| Event Location: HENN 318 | Speaker: Dr. Michael Lam (SETI Institute)
Abstract:
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October
2023
| Event Location: Henn 309 | Speaker: Raelyn Sullivan, PhD candidate, UBC (in-person)
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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October
2023
| Event Location: HENN 318 | Speaker: Douglas Scott (University of British Columbia, Department of Physics & Astronomy)
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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October
2023
| Event Location: QMI Brimacombe 488. | Speaker: Oguzhan Can(PhD student)
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October
2023
| Event Location: HENN 202 | Speaker: *This event has been cancelled*
*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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September
2023
| Event Location: HENN 202 | Speaker: Suckjoon Jun (University of California, San Diego)
Abstract:
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September
2023
| Event Location: HENN 318 | Speaker: Andy Zhao
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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September
2023
| Event Location: Henn 318 | Speaker: Wyatt Reeves(PhD student)
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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September
2023
| Event Location: Henn 318 | Speaker: Prof. Sergey Klimenko, University of Florida (remote)
TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1OUNXpiVXfLfKK0drnOyUKkQzGZj6vtjc/view?usp=sharing
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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.
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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September
2023
| Event Location: Henn 318 | Speaker: Gray Reid(PhD Student)
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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September
2023
| Event Location: HENN 202 | Speaker: Dr. Ingrid Stairs (University of British Columbia)
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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September
2023
| Event Location: Hennings 318 | Speaker: Vincent (Hong Zhe) Chen
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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September
2023
| Event Location: HENN 318 | Speaker: Dr. Anna Ordog (UBC-O and Dominion Radio Astrophysical Observatory, https://astroherzberg.org/people/anna-ordog/)
About:
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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)
About this Galaxy Seminar:
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September
2023
| Event Location: Henn 318 | Speaker: Dr. Paolo Cremonese, Universitat de las Illes Balears
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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August
2023
| Event Location: HENN 318 | Speaker: Ben Scully, PHAS summer undergraduate intern
ASTRO Colloquia for Summer 2023
* Summer undergraduate student talk will be ~20-30 minutes including Q&A
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August
2023
| Event Location: HENN 318 | Speaker: Martes Wong, PHAS summer undergraduate intern; Mercedes Thompson PHAS MSc. student
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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August
2023
| Event Location: Henn 318 | Speaker: Conor Waterfield(MSc student)
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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July
2023
| Event Location: HENN 318 | Speaker: Vaidehi Gupta, PHAS summer undergraduate intern; Harshini Paranjape, PHAS summer undergraduate intern
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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July
2023
| Event Location: https://ubc.zoom.us/j/67853605007?pwd=Y0JrQkZJdlFvb0NRc29PcWVBdWsvdz09 | Speaker: Eleni (Marilena) Lykiardopoulou (PhD student)
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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July
2023
| Event Location: HENN 318 | Speaker: James Burgoyne, PHAS M.Sc. student
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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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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July
2023
| Event Location: HENN 318 | Speaker: Dhatri Raghunathan, PHAS summer undergraduate intern
Astro Colloquia for Summer 2023
* Summer undergraduate student talk will be ~20-30 minutes including Q&A
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July
2023
| Event Location: https://ubc.zoom.us/j/66513543864?pwd=RXVQSFRFNTZINmMrZ3RJUXhHNHJXQT09 | Speaker: Luke Reynolds (PhD student)
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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