# Events Archive

## Events Archive

### HET Seminar | Xi Dong, University of California, Santa Barbara | "Enhanced Corrections to the Page Curve near Holographic Entanglement Transitions” | via Zoom

Mon, Aug 17, 2020, 2:30 pm

I will present enhanced corrections to the entanglement entropy of a subsystem in holographic states.  These corrections appear near phase transitions in the entanglement entropy due to competing extremal surfaces, and they are holographic avatars of similar corrections previously found in chaotic energy eigenstates.  I will first show...

Speaker(s):

### HET Seminar | Ken Van Tilburg, University of California, Santa Barbara | “Stellar Basins of Gravitationally Bound Particles” | via Zoom

Mon, Aug 10, 2020, 2:30 pm

I will describe and explore the consequences of a newly identified physical phenomenon: volumetric stellar emission into gravitationally bound orbits of weakly coupled particles such as axions, moduli, hidden photons, and neutrinos.

Speaker(s):

### Virtual Condensed Matter Seminar | Yuan Cao, MIT | "Competing Orders, Nematicity and Novel Josephson Effects in Superconducting Graphene Superlattices"

Mon, Jul 27, 2020, 2:00 pm

The emergence of two-dimensional materials have provided physicists with unprecedented way of studying the motion of electrons in a superconductor. Although superconductivity itself has been studied for more than a century, the recent advances of “twistronics” research in graphene superlattices brings fundamentally new physics into the picture...

Speaker(s):

### FPO - Jiaqi Jiang "Selected problems in quantum field theory in different dimensions"

Mon, Jul 27, 2020, 10:00 am
This thesis examines quantum field theories in different dimensions.

### FPO - Alexey Milekhin - "Quantum mechanical systems with holographic duals"

Fri, Jul 24, 2020, 11:00 am

This thesis is devoted to studying quantum mechanical systems with gravity duals. It is interesting to study holographic correspondence for quantum mechanical systems since we have much more theoretical control over them compared to quantum field theories.

### FPO - Justin Ripley - "General relativity and its classical modification in gravitational collapse"

Wed, Jul 1, 2020, 11:00 am

In this thesis, we describe numerical spherical collapse solutions to a modified gravity'' theory, Einstein dilaton Gauss-Bonnet (EdGB) gravity.

### FPO - Jingjing Lin "Transport Properties of Topological Chalcogenides under Pressure"

Tue, Jun 30, 2020, 2:00 pm

Magnetic breakdown refers to the tunneling of electrons between distinct orbitals beyond a critical magnetic field.

### FPO - Luca Iliesiu - "On Two-Dimensional Quantum Gravity"

Fri, Jun 26, 2020, 1:00 pm

his thesis explores topics in two-dimensional quantum gravity, focusing on the specific model of Jackiw-Teitelboim (JT) gravity and its relation to higher-dimensional black holes (BHs).

### FPO - Sanjay Moudgalya - "New Forms of Ergodicity Breaking in Quantum Many-Body Systems"

Thu, Jun 25, 2020, 11:00 am

Generic isolated interacting quantum systems are believed to be ergodic, i.e. any simple initial state evolves to a thermal state at late-times, forming a barrier to the protection of quantum information. A sufficient condition for the thermalization of initial states in an isolated quantum system is the Eigenstate Thermalization Hypothesis (...

### FPO - Christian Jepsen ""Physics of the Ultrametric"

Tue, May 19, 2020, 10:30 am

This thesis examines topics in ultrametric physics, by which is meant physical theories involving $p$-adic numbers or the $p$-adic distance function.

### FPO - Yale Fan - "Topological Structures in Supersymmetric Gauge Theories"

Mon, May 18, 2020, 1:30 pm

This thesis explores the nonperturbative physics of three-dimensional gauge field theories with varying amounts of supersymmetry through an analysis of their one-dimensional topological substructures.

### Biophysics Seminar: Andrew Leifer, Princeton University | Princeton open ventilation monitor project|Zoom

Mon, May 18, 2020, 12:00 pm

Zoom meeting ID: 935 3760 0219

Audience: A free lecture open to the public.
Speaker(s):

### HET Seminar | Wei Song, Member, School of Natural Sciences, Institute for Advanced Study; Tsinghua University | “Entanglement Entropy in Flat Holography” | via Zoom

Fri, May 15, 2020, 1:45 pm

To connect to the HET Seminar via Zoom, please do the following:

1 -  If you have Zoom installed on your device, enter the following meeting ID:  730333408, click Join Meeting.

Speaker(s):

### Pheno & Vino Seminar | Jan Heisig, CP3 UC Louvain | "Probing dark matter with cosmic-ray antiprotons" Zoom link: bit.ly/phenoandvino

Tue, May 12, 2020, 4:00 pm

Cosmic-ray observations provide a powerful probe of dark-matter annihilation in the Galaxy. In this talk I present recent analyses of the AMS-02 antiproton data, reducing cosmic-ray propagation uncertainties by fitting at the same time dark-matter and cosmic-ray propagation parameters.

Speaker(s):

### Biophysics Seminar: Vir Bulchandani, University of California at Berkeley | Digital herd immunity and COVID-19|Zoom

Mon, May 11, 2020, 12:00 pm

Zoom meeting ID: 967 8799 8386

Audience: A free lecture open to the public.
Speaker(s):

### FPO - Sonia Zhang - "Topology in Quantum Magnets and Superconductors"

Fri, May 8, 2020, 1:00 pm

A unifying theme in understanding the macroscopic properties of quantum materials is the concept of emergence, where novel effects and unusual phases arise from the interplay of spin-orbit effects, band topology and strong correlation.

### Mathematical Physics Seminar: Simone Warzel,TU-Munich, "Spectral Gaps, Incompressibility and Fragmented Matrix-Product State in a Fractional Quantum Hall System"

Tue, May 5, 2020, 2:00 pm

In the thin cylinder regime Haldane’s pseudo-potential corresponding to one-third filling results in a frustration-free fermionic lattice Hamiltonian which is dipole-conserving with an added electrostatic interaction. Its zero-energy eigenspace is exponentially large.

Speaker(s):