Perimeter Institute Graduate Students' Conference 2024

September 12, 2024 - September 13, 2024

12 talks C24041 Conference/School

The annual Graduate Students’ Conference showcases the diverse research directions at Perimeter Institute, both organized and presented by the students. Our graduate students are invited to share their best work with their fellow PhD students, PSI students and other PI residents interested in hearing about physics research and discussing it in a lively atmosphere full of questions.

PSI students are welcome to join as audience members on Friday, Sept 13 and to present a Lightning Talk if they wish to do so.

Displaying 1 - 12 of 12

Everything that can be learned about a causal structure with latent variables by observational and interventional probing schemes

Marina Maciel Ansanelli - Perimeter Institute for Theoretical Physics

September 12, 2024 PIRSA:24090191 Conference
Violation of Bell's inequality in continuous variable systems

Gurpahul Singh

September 12, 2024 PIRSA:24090195 Conference
Energy cost of maximal entanglement extraction in QFT

Kelly Wurtz

September 12, 2024 PIRSA:24090196 Conference
Channel Expressivity Measures

Matthew Duschenes - Perimeter Institute for Theoretical Physics

September 12, 2024 PIRSA:24090201 Conference
The g-function and defect changing operators from wavefunction overlap on a fuzzy sphere

Zheng Zhou - Perimeter Institute for Theoretical Physics

September 13, 2024 PIRSA:24090190 Conference
Open Quantum On Lie Group: An Effective Field Theory Approach

Afshin Besharat - University of Alberta

September 13, 2024 PIRSA:24090192 Conference
Photon Rings and Shadow Size for General Integrable Spacetimes

Kiana Salehi - perimeter institute and university of Waterloo

September 13, 2024 PIRSA:24090193 Conference
Spontaneous Symmetry Breaking and Goldstone Theorem

Emilia Szymańska

September 13, 2024 PIRSA:24090197 Conference
Large charge sector in the theory of a complex scalar field with quartic self-interaction

Sergio Sanjurjo

September 13, 2024 PIRSA:24090200 Conference
Timelike Surfaces in Gravity

Themistocles Zikopoulos - Perimeter Institute

September 13, 2024 PIRSA:24090199 Conference
A Hunt for the Physical Manifestation of Black Hole Unitarity

Hyo Jung Park

September 13, 2024 PIRSA:24090194 Conference
Ferroelectric 2D semiconductors

Costanza Pennaforti

September 13, 2024 PIRSA:24090198 Conference

Everything that can be learned about a causal structure with latent variables by observational and interventional probing schemes

Marina Maciel Ansanelli - Perimeter Institute for Theoretical Physics

September 12, 2024 PIRSA:24090191 Conference

What types of differences among causal structures with latent variables are impossible to distinguish by statistical data obtained by probing each visible variable? If the probing scheme is simply passive observation, then it is well-known that many different causal structures can realize the same…
Violation of Bell's inequality in continuous variable systems

Gurpahul Singh

September 12, 2024 PIRSA:24090195 Conference

Violations of Bell’s inequality have been studied for spin-1/2 systems in much detail. Turns out that one can show Bell violation for systems that are expressed in terms of continuous variables such as position and momentum. The most ubiquitous examples of such systems are Gaussian states, notably…
Energy cost of maximal entanglement extraction in QFT

Kelly Wurtz

September 12, 2024 PIRSA:24090196 Conference

We present a study of the relationship between energy and entanglement in finite regions of possibly arbitrary shape in QFT. We show how one can quantify the entanglement avoiding divergences by using techniques inspired by the formalism of particle detectors in relativistic quantum information. We…
Channel Expressivity Measures

Matthew Duschenes - Perimeter Institute for Theoretical Physics

September 12, 2024 PIRSA:24090201 Conference

The dynamics of closed quantum systems undergoing unitary processes has been well studied, leading to notions of measures for the expressive power of parameterized quantum circuits, relative to the unique, maximally expressive, average behaviour of ensembles of unitaries. Such unitary expressivity…
The g-function and defect changing operators from wavefunction overlap on a fuzzy sphere

Zheng Zhou - Perimeter Institute for Theoretical Physics

September 13, 2024 PIRSA:24090190 Conference

This talk will be based on SciPost Phys. 17, 021 (2024). Defects are common in physical systems with boundaries, impurities or extensive measurements. The interaction between bulk and defect can lead to rich physical phenomena. Defects in gapless phases of matter with conformal symmetry usually flow…
Open Quantum On Lie Group: An Effective Field Theory Approach

Afshin Besharat - University of Alberta

September 13, 2024 PIRSA:24090192 Conference

In this work, we propose a systematic method to obtain the effective field theory of the quantum dissipative systems which nonlinearly realize symmetries. We focus on the high temperature or Brownian limit, in which the effective action of the dissipative dynamics is localized in time. We first…
Photon Rings and Shadow Size for General Integrable Spacetimes

Kiana Salehi - perimeter institute and university of Waterloo

September 13, 2024 PIRSA:24090193 Conference

There are now multiple direct probes of the region near black hole horizons, including direct imaging with the Event Horizon Telescope (EHT). As a result, it is now of considerable interest to identify what aspects of the underlying spacetime are constrained by these observations. For this purpose…
Spontaneous Symmetry Breaking and Goldstone Theorem

Emilia Szymańska

September 13, 2024 PIRSA:24090197 Conference

We discuss the concept of spontaneous symmetry breaking and illustrate it with a general example. We consider Wigner-Weyl and Nambu-Goldstone realisations of symmetry in the quantum theory. Next, we state Goldstone’s theorem and sketch its proof. We discuss why quantum chromodynamics is not realised…
Large charge sector in the theory of a complex scalar field with quartic self-interaction

Sergio Sanjurjo

September 13, 2024 PIRSA:24090200 Conference

The theory $S = \int\text{d}^{4-\epsilon}x\left(\frac{1}{2}|\partial\phi|^2 - \frac{m^2}{2}|\phi|^2-\frac{g}{16}|\phi|^4\right)$ exhibits a global $U(1)$ symmetry, and the operators $\phi^n$ ($\bar\phi^n$) have charge $n$ ($-n$) with respect to this symmetry. By rescaling the fields and the coupling…
Timelike Surfaces in Gravity

Themistocles Zikopoulos - Perimeter Institute

September 13, 2024 PIRSA:24090199 Conference

It may be the case that a spacetime exhibits no asymptotia where gauge invariant observables can be defined in a natural way. On such occasions the introduction of a timeline boundary may be helpful. We therefore discuss the initial boundary value problem in the context of General Relativity.
A Hunt for the Physical Manifestation of Black Hole Unitarity

Hyo Jung Park

September 13, 2024 PIRSA:24090194 Conference

The black hole information paradox is a fundamental conflict between the quantum-mechanical and thermodynamic descriptions of black holes, specifically of their particle-emission process known as the Hawking radiation. The paradox concerns whether the radiation of a black hole is a unitary time…
Ferroelectric 2D semiconductors

Costanza Pennaforti

September 13, 2024 PIRSA:24090198 Conference

This work investigates the ferroelectric properties of γ − In₂Se₃, a material that uniquely retains its spontaneous polarization at the nano-scale, making it resistant to depolarizing fields. With a direct band gap of 1.8 eV and the ability to switch between insulating and semiconducting phases at…

Title	Speaker(s)	Date	Talk Type	Info
Everything that can be learned about a causal structure with latent variables by observational and interventional probing schemes	Marina Maciel Ansanelli	2024-09-12	Conference	View details
Violation of Bell's inequality in continuous variable systems	Gurpahul Singh	2024-09-12	Conference	View details
Energy cost of maximal entanglement extraction in QFT	Kelly Wurtz	2024-09-12	Conference	View details
Channel Expressivity Measures	Matthew Duschenes	2024-09-12	Conference	View details
The g-function and defect changing operators from wavefunction overlap on a fuzzy sphere	Zheng Zhou	2024-09-13	Conference	View details
Open Quantum On Lie Group: An Effective Field Theory Approach	Afshin Besharat	2024-09-13	Conference	View details
Photon Rings and Shadow Size for General Integrable Spacetimes	Kiana Salehi	2024-09-13	Conference	View details
Spontaneous Symmetry Breaking and Goldstone Theorem	Emilia Szymańska	2024-09-13	Conference	View details
Large charge sector in the theory of a complex scalar field with quartic self-interaction	Sergio Sanjurjo	2024-09-13	Conference	View details
Timelike Surfaces in Gravity	Themistocles Zikopoulos	2024-09-13	Conference	View details
A Hunt for the Physical Manifestation of Black Hole Unitarity	Hyo Jung Park	2024-09-13	Conference	View details
Ferroelectric 2D semiconductors	Costanza Pennaforti	2024-09-13	Conference	View details

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