Format results
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Dynamics from Dispersion: a versatile tool
Makinde Ogunnaike - Massachusetts Institute of Technology (MIT)
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Long-Range Order on Line Defects in Ising Conformal Field Theories
Ryan Lanzetta - Perimeter Institute for Theoretical Physics
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Lieb-Schultz-Mattis anomalies as obstructions to gauging - VIRTUAL
Sahand Seifnashri - Institute for Advanced Study (IAS)
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Anomalies of Non-Invertible Symmetries in 3+1d
Po-Shen Hsin - California Institute of Technology (Caltech)
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Nonlinear bosonization, (Non-)Fermi Liquids, and the anomalous Hall effect
Yi-Hsien Du - University of Chicago
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Spin-Peierls instability of the U(1) Dirac spin liquid
Urban Seifert - University of California, Santa Barbara
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Ultraslow dynamics, fragile fragmentation, and geometric group theory
Ethan Lake - University of California, Berkeley
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Phase transitions out of quantum Hall states in moire bilayers
Senthil Todadri - Massachusetts Institute of Technology (MIT) - Department of Physics
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Petz map recovery in quantum many-body systems
Yijian Zou - Perimeter Institute for Theoretical Physics
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Models of deconfined criticality for square and triangular lattice antiferromagnets
Henry Shackleton - Harvard University
Frustrated quantum magnets provide a promising platform for realizing exotic phase transitions known as deconfined quantum critical points (DQCPs), where a conventional Landau-Ginzburg description fails and the resulting description involves emergent gauge fields. In the first part of my talk, I… -
Equilibrium dynamics of infinite-range quantum spin glasses in a field - VIRTUAL
Maria Tikhanovskaya - Harvard University
We determine the low-energy spectrum and Parisi replica symmetry breaking function for the spin glass phase of the quantum Ising model with infinite-range random exchange interactions and transverse and longitudinal (h) fields. We show that, for all h, the spin glass state has full replica symmetry… -
Dynamics from Dispersion: a versatile tool
Makinde Ogunnaike - Massachusetts Institute of Technology (MIT)
Driven by rapid advancements in quantum simulation capabilities across diverse physical platforms, open quantum systems are now of great interest, with special focus on thermalization processes of interacting many-body systems. Various techniques have been used to study operator spreading, to… -
Long-Range Order on Line Defects in Ising Conformal Field Theories
Ryan Lanzetta - Perimeter Institute for Theoretical Physics
It is well-known that one-dimensional systems at finite temperature, such as the classical Ising model, cannot spontaneously break a discrete symmetry due to the proliferation of domain walls. The validity of this statement rests on a few assumptions, including the spatial locality of interactions… -
Lieb-Schultz-Mattis anomalies as obstructions to gauging - VIRTUAL
Sahand Seifnashri - Institute for Advanced Study (IAS)
In this talk, we identify anomalies of 1+1d lattice Hamiltonian systems as ’t Hooft anomalies. We consider anomalies in internal symmetries as well as Lieb-Schultz-Mattis (LSM) type anomalies involving lattice translations. Using topological defects, we derive a simple formula for the ‘anomaly… -
Anomalies of Non-Invertible Symmetries in 3+1d
Po-Shen Hsin - California Institute of Technology (Caltech)
Anomaly of global symmetry is an important tool to study dynamics of quantum systems. In recent years, new non-invertible global symmetries are discovered in many quantum systems such as the 2d Ising model, Standard Model like theories, and lattice models. I will discuss constraints on the dynamics… -
A New Picture of Quantum Dynamics and A New Kind of Tensor Network
I will introduce a new picture of quantum dynamics that might be thought of as "gauging" Schrodinger's picture that results in many "local" Hilbert spaces [1]. Truncating the dimensions of the local Hilbert spaces in this new picture yields an exciting new kind of tensor network whose computational… -
Nonlinear bosonization, (Non-)Fermi Liquids, and the anomalous Hall effect
Yi-Hsien Du - University of Chicago
Fermi liquid theory is a cornerstone of condensed matter physics. I will show how to formulate Fermi liquid theory as an effective field theory. In this approach, the space of low-energy states of a Fermi liquid is identified with a coadjoint orbit of the group of canonical transformations. The… -
Spin-Peierls instability of the U(1) Dirac spin liquid
Urban Seifert - University of California, Santa Barbara
The presence of many competing classical ground states in frustrated magnets implies that quantum fluctuations may stabilize quantum spin liquids (QSL), which are characterized by fractionalized excitations and emergent gauge fields. A paradigmatic example is the U(1) Dirac spin liquid (DSL), which… -
Ultraslow dynamics, fragile fragmentation, and geometric group theory
Ethan Lake - University of California, Berkeley
An ongoing program of work in statistical physics and quantum dynamics is concerned with understanding the character of systems which follow an unconventional approach towards thermal equilibrium. In this talk, I will add to this story by introducing examples of simple 1D systems---both classical… -
Phase transitions out of quantum Hall states in moire bilayers
Senthil Todadri - Massachusetts Institute of Technology (MIT) - Department of Physics
Quantum Hall phases are the most exotic experimentally established quantum phases of matter.Recently they have been discovered at zero external magnetic field in two dimensional moire materials. I will describe recent work (with Xue-Yang Song and Ya-Hui Zhang) on their proximate phases and… -
Petz map recovery in quantum many-body systems
Yijian Zou - Perimeter Institute for Theoretical Physics
We study the Petz map, which is a universal recovery channel of a tripartite quantum state upon erasing one party, in quantum many-body systems. The fidelity of the recovered state with the original state quantifies how much information shared by the two parties is not mediated by one of the party…