Events List for the Academic Year
Event Time:
Thursday, October 12, 2023 | 4:00 pm - 5:00 pm
Event Location:
HENN 318
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2023-10-12T16:00:00
2023-10-12T17:00:00
The Cosmic Neutrino Background
Event Information:
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:
Following an undergraduate in astrophysics from the University of Edinburgh in 1986, Dr. Scott obtained a doctoral degree from the University of Cambridge in 1991. After postdoctoral work at the University of California, Berkeley in the early 1990s, he joined UBC’s faculty in 1995. He is currently a professor in UBC’s Department of Physics and Astronomy.
Dr. Scott's research interests include: Theoretical and Observational Cosmology, Cosmic Microwave Background, Structure Formation, Sub-mm Cosmology, and Astro-statistics. He is currently involved in a variety of projects from the Canadian team in Planck LFI, SCUBA-2 Data Reduction Software, the SCUBA HAlf Degree Extragalactic Survey, The Balloon-borne Large Aperture Submillimetre Telescope, the Herschel Multi-tiered Extragalactic Survey, and the Particle Data Group.
Learn More:
Find out more from Dr. Scott's Faculty webpage
Learn more about Dr. Scott's research interests
Related Projects:
Canadian involvement in Planck LFI
SCUBA-2 Data Reduction Software
The SCUBA HAlf Degree Extragalactic Survey
The Balloon-borne Large Aperture Submillimetre Telescope
The Herschel Multi-tiered Extragalactic Survey
The Particle Data Group
Event Location:
HENN 318
Event Time:
Friday, October 6, 2023 | 10:00 am - 12:00 pm
Event Location:
QMI Brimacombe 488.
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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.
Event Time:
Thursday, October 5, 2023 | 4:00 pm - 5:00 pm
Event Location:
HENN 202
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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
Event Information:
*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.
This talk will explore this history and take an in-depth look at how principles from this history were applied to physics to make significant policy changes. The data presented will uncover a concerning climate for LGBT+ physicists, which can be even more challenging for trans persons and People of Color. The talk will conclude with concrete actions that everyone can take to become more informed about Queer Studies and implement impactful best practices in their own lives.
Bio:
Ramón Barthelemy is an assistant professor of physics and astronomy at the University of Utah and a fellow of the American Physical Society. Previous to his faculty position Ramón was a Fulbright Scholar in Finland, a Science Policy Fellow in the U.S. Department of Education and a private sector consultant. His work focuses on the lives, educational experiences, and career paths of marginalized students in physics and STEM. This has included work on LGBT+ people, graduate Students of Color, and women in physics. Through this work he has become a global leader on LGBT+ inclusion in STEM with dozens of publications and over $5M in National Science Foundation funding.
Ramón was the 2020 recipient of the Fulbright Finland Alumni Award, the 2021 recipient of the AAPT Doc Brown Futures award, and the 2022 WEPAN Research award recipient. He is now also running to be a Utah State House Representative. You can reach him on Twitter @RamonBarthelemy or his research group’s website www.PERUtah.com
Event Location:
HENN 202
Event Time:
Thursday, September 28, 2023 | 4:00 pm - 5:00 pm
Event Location:
HENN 202
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2023-09-28T16:00:00
2023-09-28T17:00:00
Growth, size, and precision control
Event Information:
Abstract: Physicists aim to understand fundamental problems in nature by describing them quantitatively. This understanding often follows three steps: collecting (improved) data, providing a quantitative description with predictive ability, and identifying underlying mechanisms. Similarly, bacterial cell physiology in biology follows these steps. In this colloquium, I will discuss cell size control, using the extensively-studied bacterial organism, E. coli, as an example. We will explore what determines average cell size, how E. coli corrects size deviations, and our current understanding of the underlying processes.
Bio:
Suckjoon Jun was trained as a theoretical physicist and began his laboratory work as a Bauer Fellow at Harvard University in 2007. It was there that he transitioned to experimental quantitative biology. In 2012, he relocated his lab to UCSD, significantly contributing to the institution's reputation as a leading force in quantitative biology. His accolades include being named an Allen Distinguished Investigator (2013), a Pew Scholar (2013), and a Scialog Fellow (2015). Furthermore, he has been honored with the NSF CAREER award (2013), the Lattimer Award (2019), and the Michael and Kate Bárány Award from the Biophysical Society (2022).
2004 Ph.D - Simon Fraser University2004 - 2007 Postdocs in the Netherlands and France2007 - 2012 Bauer Fellow (Harvard)2012 - present UCSD
Event Location:
HENN 202
Event Time:
Tuesday, September 26, 2023 | 2:00 pm - 3:00 pm
Event Location:
HENN 318
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2023-09-26T14:00:00
2023-09-26T15:00:00
Hemisphere index of 3d N=4 and enumerative geometry
Event Information:
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.
In this talk, I will discuss the partition function of a three-dimensional supersymmetric QED on hemisphere times S^1. I will highlight some interesting aspects of its derivation using supersymmetric localisation and interpret it as a K-theoretic Euler characteristic, a central concept in enumerative geometry. I will also briefly explain its role in testing 3d mirror symmetry (known as symplectic duality in pure mathematics).
Based on https://arxiv.org/abs/2306.16448
Event Location:
HENN 318
Event Time:
Tuesday, September 26, 2023 | 10:00 am - 12:00 pm
Event Location:
Henn 318
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2023-09-26T10:00:00
2023-09-26T12:00:00
Quantum Chaos in Conformal Field Theories"
Event Information:
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. Moreover, the AdS/CFT correspondence suggests that chaotic CFTs are important for understanding black holes, which themselves are chaotic systems.
However, the highly symmetric structure of these systems can tend to hide the underlying chaotic behaviour; this unique structure requires us to find the right language and diagnostics for discussing chaotic phenomenon. In this thesis we make significant progress to this end: we demonstrate the part of the energy spectrum that is unconstrained by symmetry and displays chaotic behaviour; we study the link between quantum chaos and the strange properties of ``arithmetic chaos''; we create an effective field theory for analyzing chaotic behaviour and its link to standard CFT technology; and we analyze CFTs with a boundary and their AdS/CFT dual, which have been used to model chaotic black holes.
Event Location:
Henn 318
Event Time:
Monday, September 25, 2023 | 11:00 am - 12:00 pm
Event Location:
Henn 318
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2023-09-25T11:00:00
2023-09-25T12:00:00
Einstein’s Zoo: the hunt for new species
Event Information:
TALK RECORDING AVAILABLE AT: https://drive.google.com/file/d/1OUNXpiVXfLfKK0drnOyUKkQzGZj6vtjc/view?usp=sharing
Abstract:
With the first direct observation of gravitational waves (GW) on September 14, 2015, the advanced GW detectors opened new possibilities to explore our Universe. The first GW signal was not from a much-anticipated binary neutron stars (BNS), but from a quite unexpected merger of binary black holes (BBH), which challenged the existing BBH formation models and inspired new insights into the evolution of massive stars. Several years later, the GW detectors have recorded two BNS and more then 90 BBH signals, including a BBH merger on May 21, 2019 – a possible missing link between stellar mass black holes and supermassive black holes. That was another unexpected GW event, which has far-reaching astrophysical implications and marks the beginning of an active research on a new class of BBH sources. Future observations with improving LIGO detectors are likely to discover anticipated or possibly new GW sources - we should be ready for unexpected. I will talk about LIGO observations, detection of transient (burst) GW signals from a wide range of potential astrophysical sources, detection challenges for signals with poorly known or uncertain models and discuss astrophysical implications of the burst analysis.
Event Location:
Henn 318
Event Time:
Thursday, September 21, 2023 | 4:00 pm - 5:00 pm
Event Location:
HENN 202
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2023-09-21T16:00:00
2023-09-21T17:00:00
Research Jamboree! A deep dive into diverse research fields
Event Information:
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
Quantum materials are solids that have remarkable mechanical, electrical, and magnetic properties derived from intense quantum mechanical effects. In the Hallas group, we seek to discover new quantum materials using the tools of crystal growth and to uncover their nature using muons, neutrons, and x-rays as probes. The ultimate goal of this research is to understand and control the materials that will unlock next generation technologies.
2. Cindy Shaheen (Sabrina Leslie Lab): Single-molecule biophysics: towards understanding living systems and therapies one molecule at a time
Why: Our world is a molecular world. Overcoming global health challenges requires the constant development of new therapies and vaccines to treat diseases and viruses, as well as new products for aiding agriculture and healing the environment. This requires advancing our characterization and understanding of the underlying complex series of molecular reactions, which occur one molecule at a time, with new biophysical tools.
What: At Leslie Lab, we are advancing the field by contributing new single-molecule and single-cell imaging methods and insights which are capable of advancing our understanding of these complex reactions, and connecting these insights to real-world results. We combine our unique imaging data which tells a “story” of the journey of a molecule/particle/drug as it enters a cell, with other forms of data such as genomic and proteomic data, to understand how life works at the finest scale.
How: Our team of biophysicists including graduate students in Physics, Chemistry, Biochemistry and Engineering, engages in collaborative innovation and research with diverse researchers, based at UBC as well as at the BC Cancer Agency, industry, and internationally, and together we aim to help advance the forefronts of biophysics research as well as global health and wellbeing.
3. Chris Hearty: Searching for new physics as a graduate student on Belle II
The Belle II experiment is located at the SuperKEKB e+ e- particle collider in Tsukuba Japan. It has unique sensitivity to new particles that are not part of the Standard Model of particle physics, including the possibility of being the first experiment to establish the production of dark matter in the laboratory.
4. Valery Milner: Title: Probing Many-body Quantum Systems with Molecular Rotors
We use an advanced laser tool, known as an “optical centrifuge”, to control the rotation of molecules with laser light. We study the dynamics of centrifuged molecular “super-rotors” inside strongly interacting many-body quantum systems, such as superfluid liquid helium.
5. Allison Man/Lucas Kuhn: Galaxy evolution across cosmic time
The UBC Extragalactic Astrophysics group uses telescope observations to investigate the myriad physical processes that drive galaxy evolution. I’ll provide an overview of our research questions, methods, activities, and potential projects.
6. Chloé Malbrunot/Doug Bryman: RARE & PRECIOUS (& PRECISE)! How rare decays could reveal cracks in the standard model of particle physics
I’ll present the activities of the UBC/TRIUMF rare decay group. In particular I’ll highlights our involvements in previous, current and future experiments at CERN, TRIUMF and PSI (Switzerland). I’ll show how pion and kaon rare decays can be exciting unique probes to new physics.
7. Steve Plotkin: Recent Biophysics Inventions and Discoveries in the Plotkin Lab
Some recent discoveries that we have made in our research programs will be described. These will include Shawn Hsueh's and Santanu Sasidharan's use of synthetic biology to design novel therapeutics for COVID, as well as several surprises that Pranav Garg and Gabriel Dall'Alba have found after we sequenced the genome of a primordial comb jelly, now thought to be the earliest branching multicellular animal on the tree of life.
8. Andrew Potter: Realizing dynamical phases of quantum matter in trapped-ions
I will present highlights about engineering two new dynamical phases of matter in trapped-ion "spin" chains: i) a time-crystal: a phase of matter that spontaneously breaks time-translation symmetry, and ii) a dynamical topological phase in a quasi-periodically driven spin chain that exhibits emergent encoded edge qubits that are dynamically protected from a large class of errors. These phases are fundamentally forbidden in thermal equilibrium and rely crucially on the use of strong-driving and disorder-induced localization to prevent the ions from relaxing to equilibrium. I will discuss challenges for realizing these phases in solid-state systems where they could be converted into devices.
Event Location:
HENN 202
Event Time:
Wednesday, September 20, 2023 | 3:00 pm - 5:00 pm
Event Location:
Henn 318
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2023-09-20T15:00:00
2023-09-20T17:00:00
Topics in Numerical Relativity
Event Information:
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. After demonstrating the existence of these stationary solutions, we turn our attention to their stability through a combination of linear perturbation theory and dynamical simulation. In doing so, we demonstrate that the novel solutions we have found, as well as the highly compact solutions investigated by previous authors, appear to be generically unstable to radial perturbations. As such, we find that d-stars are poor candidates for astrophysically relevant black hole mimickers.
Generalizing from the stability of solutions to the stability of methods, we introduce a novel formulation of numerical relativity which we refer to as reference metric covariant and conformal Z4 (RCCZ4). Like its Z4 namesake, RCCZ4 promotes the 3+1 Hamiltonian and momentum constraints to dynamical degrees of freedom. Unlike Z4 however, RCCZ4 accomplishes this by coupling the constraints to an external reference metric completely independently of the physical metric. Although we have only investigated RCCZ4 in the case of time independent Lorenzian reference metrics, the method may generalize to user specifiable reference metrics which could potentially confer additional beneficial properties. Even in this simple case, however, the performance of RCCZ4 is comparable to leading hyperbolic formulations.
The final part of our thesis works towards developing superior understanding of strong field gravity through the investigation of gravitational collapse. We consider the system consisting of the electromagnetic and general relativistic gravitational fields and investigate the threshold of black hole formation in axisymmetry. Previous studies of this system have reported family dependent scaling phenomena as criticality is approached. Although we find good agreement with previous investigations of dipole-type initial data, our investigations of quadrupole-type initial data point towards universal scaling as opposed to family dependent scaling.
Event Location:
Henn 318
Event Time:
Thursday, September 14, 2023 | 4:00 pm - 5:00 pm
Event Location:
HENN 202
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2023-09-14T16:00:00
2023-09-14T17:00:00
Evidence for low-frequency gravitational waves from pulsar timing
Event Information:
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.
Bio:
Ingrid Stairs graduated from McGill University in Honours Physics and subsequently got her PhD in Physics from Princeton University. She was an NSERC postdoctoral fellow at Jodrell Bank Observatory at the University of Manchester in the UK, then a Jansky Fellow of the National Radio Astronomy Observatory in Green Bank, West Virginia.
She has been on the faculty at UBC since 2002 and devotes her research time to the study of radio pulsars and Fast Radio Bursts using some of the world's largest radio telescopes, including the CHIME telescope near Penticton, BC. She has won awards including the Canadian Astronomical Society Peter G. Martin Award for Mid-Career Achievement and the
Royal Society of Canada Rutherford Memorial Medal in Physics. She is a Fellow of the CIFAR Gravity and Extreme Universe Program and of the American Physical Society.
Learn More:
See Ingrid's faculty webpage here
Event Location:
HENN 202
Event Time:
Tuesday, September 12, 2023 | 2:00 pm - 3:00 pm
Event Location:
Hennings 318
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2023-09-12T14:00:00
2023-09-12T15:00:00
Asymptotic entanglement and celestial holography
Event Information:
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.
I will present work [arXiv:2308.12341] that considers the entanglement of a Milne patch for Maxwell theory in Minkowski spacetime from the perspective of celestial holography. In the Minkowski vacuum, we find that the Milne patch is thermally entangled. We interpret the thermal entangling operator that builds the Minkowski vacuum from the Milne vacuum as an interaction term in the celestial CFT. We further examine the edge modes of the Milne patch, assigning them a physical interpretation as fluctuations in Milne asymptotic charge.
Interestingly, we find that the constraint governing these edge modes includes sources that avoid the Minkowski interior. Altogether, by studying entanglement along the extra holographic direction present in celestial holography but absent in AdS/CFT, our work bridges a critical gap between our understanding of entanglement in the latter and the physically relevant setting of asymptotically flat spacetime.
Event Location:
Hennings 318
Event Time:
Monday, September 11, 2023 | 4:00 pm - 5:00 pm
Event Location:
HENN 318
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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
Event Information:
About:
The Milky Way hosts an extensive and complicated Galactic magnetic field structure ranging in scale from stellar environments up to the Galactic spiral arms. Establishing a thorough understanding of the present-day three-dimensional magnetic field morphology is instrumental to developing a complete understanding of the physics of the Milky Way. The magnetized interstellar medium imprints signatures of its structure onto polarisation maps of the radio sky, and a wealth of information can be gained by studying how observed Galactic polarised synchrotron emission varies with frequency through the effect of Faraday rotation.
In this talk, I present recent progress toward Galactic polarisation maps from the radio telescopes at the Dominion Radio Astrophysical Observatory (DRAO). Specifically, I show results from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope and the DRAO 15-m single-dish telescope. The data sets will form the low-frequency, Northern hemisphere contribution to the Global Magneto-Ionic Medium Survey (GMIMS), an ongoing international effort to map the entire polarised radio sky covering 300 to 1800 MHz that will yield unprecedented spatial coverage and Faraday rotation resolution for studying large-scale structures in the magnetized interstellar medium (ISM). All previously published and new GMIMS data sets are already yielding fascinating insights into the magnetic field structure, and I highlight some of the early science results. These include: differences between the large-scale patterns in the northern and southern Galactic hemispheres, which inform dynamo models of the magnetic field, examples of Faraday complexity towards objects such as HII regions, and potential methods to distinguish the layers of the magnetized ISM through comparisons of data sets probing different depths.
Bio:
Anna is a postdoctoral researcher at the Dominion Radio Astrophysical Observatory and UBC Okanagan. She studies the magnetized interstellar medium of the Milky Way Galaxy. Specifically, she has been involved in commissioning a new radio telescope for a polarization survey of the northern sky, and she is on the Galactic Science team for the Canadian
Hydrogen Intensity Mapping Experiment (CHIME).
Event Location:
HENN 318
Event Time:
Monday, September 11, 2023 | 11:00 am - 12:00 pm
Event Location:
HENN 318
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2023-09-11T11:00:00
2023-09-11T12:00:00
Different Angles on Accreting Supermassive Black Holes
Event Information:
About this Galaxy Seminar:
The fruits of using state-of-the-art technology in astrophysics research to unravel the unknown on a cosmic scale has meant that our understanding has leapt both wide and deep in more senses than one. In particular, the heftiest things we know, namely supermassive black holes, have emerged from being a mathematical construct a hundred years ago, to being understood as utterly common objects that inhabit every reasonably sized galaxy. Early evidence rested on the Sherlock-Holmes argument, but thanks to our wide and sharp eyes we have direct evidence for supermassive black holes today.
In this talk I will review the phenomenology of accreting supermassive black holes and their jets. The understanding that has emerged from their systematics at multiple frequencies, combined with the results from computational simulations and connections with properties of their host galaxies and their evolution will be discussed.
Bio:
I have been an astrophysicist for nearly four decades. My core research interest is the empirical investigation of giant black holes that are found in the centres of distant galaxies. I believe that nurturing learning environments pave the way towards excellence. While acutely aware of my privilege of being paid to be fascinated by the universe, I am continually amazed that the amateur astronomers often stand out as the impassioned ones.
My science questions are focused on the phenomenology of accreting supermassive black holes, and I gather and use data from telescopes that operate at radio, infrared, optical, ultraviolet, X-ray and gamma-ray frequencies. I also believe that science is for everyone and that public ownership of the scientific enterprise is necessary for a citizenry to become truly modern.
See Prajval Shastri's webpage here
Event Location:
HENN 318
Event Time:
Thursday, September 7, 2023 | 11:00 am - 12:00 pm
Event Location:
Henn 318
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2023-09-07T11:00:00
2023-09-07T12:00:00
Wave Optics in Gravitational Wave Lensing
Event Information:
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
Event Time:
Monday, August 21, 2023 | 3:00 pm - 4:00 pm
Event Location:
HENN 318
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2023-08-21T15:00:00
2023-08-21T16:00:00
Semi-supervised clustering of LIGO-VIRGO signals to improve GSpyNetTree classification
Event Information:
ASTRO Colloquia for Summer 2023
* Summer undergraduate student talk will be ~20-30 minutes including Q&A
Event Location:
HENN 318
Event Time:
Monday, August 14, 2023 | 3:00 pm - 4:00 pm
Event Location:
HENN 318
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2023-08-14T15:00:00
2023-08-14T16:00:00
ASTRO Colloquia for Summer 2023
Event Information:
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
* Each graduating MSc student talks will be 30 minutes including Q&A
Event Location:
HENN 318
Event Time:
Tuesday, August 8, 2023 | 2:00 pm - 3:00 pm
Event Location:
Henn 318
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2023-08-08T14:00:00
2023-08-08T15:00:00
Geodesic Scattering and Lorentz Invariance in Stochastic Gravity
Event Information:
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. The scattering of geodesics is determined to be a small effect and not predicted in the framework of semiclassical or stochastic gravity. The study of geodesic deviation in interferometer experiments gives some indication that parametric resonance effects could have a significant role in stochastic gravity. The Pauli-Villars regularization scheme is shown to have significant problems when applied to stochastic gravity, such as failures in second-order stress-energy tensor terms and restrictions due to the kinematic properties of negative-norm fields.
Event Location:
Henn 318
Event Time:
Monday, July 31, 2023 | 3:00 pm - 4:00 pm
Event Location:
HENN 318
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2023-07-31T15:00:00
2023-07-31T16:00:00
ASTRO Colloquia for Summer 2023
Event Information:
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
Event Time:
Friday, July 28, 2023 | 9:00 am - 12:00 pm
Event Location:
https://ubc.zoom.us/j/67853605007?pwd=Y0JrQkZJdlFvb0NRc29PcWVBdWsvdz09
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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
Event Information:
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.
In this work, mass measurements of Mg and Na isotopes are carried out and the results indicate, for the first time, a gradual re-emergence of magicity or closed shell behavior for Z ≤ 11 nuclei at the N = 20 island of inversion. The results also discover a previously unknown low-lying isomer, hence a long-lived excited state in 32Na.
Beyond studies of nuclear structure via direct mass measurements, this thesis describes the technical developments and improvements to the Measurement Penning Trap (MPET). The Penning trap, an experimental apparatus that uses electric and magnetic fields to determine the atomic mass through the ion’s cyclotron frequency, has been upgraded to operate at cryogenic temperatures with the goal to reach storage times on the order of seconds for Highly-Charged Ions. The aim for this upgrade is an improvement of the achievable precision by an order of magnitude.
Event Location:
https://ubc.zoom.us/j/67853605007?pwd=Y0JrQkZJdlFvb0NRc29PcWVBdWsvdz09
Event Time:
Monday, July 24, 2023 | 3:00 pm - 4:00 pm
Event Location:
HENN 318
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2023-07-24T15:00:00
2023-07-24T16:00:00
ASTRO Colloquia for Summer 2023
Event Information:
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