In the context of theories with a first order phase transition, we propose a general covariant description of coexisting phases separated by domain walls using an additional order parameter-like degree of freedom. In the case of a holographic dual of confining and de-confining phases, the resulting model extends hydrodynamics and…

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A high energy muon collider is a unique machine that breaks the traditional energy/precision dichotomy. It provides both an unprecedented reach in energy with a compact ring and a clean environment that allows precise measurements. I will provide an overview of the powerful physics potential of a multi-TeV muon collider, starting from its…

The Higgs boson was discovered in 2012 by the ATLAS and CMS experiments at the world’s most powerful particle collider, the Large Hadron Collider (LHC) in Geneva, Switzerland. This particle plays a unique role in fundamental physics. It gives all of the known elementary particles, including itself, their masses. While we now have a strong…

Topologists can differentiate between bagels and pretzels by simply counting holes in each bread. The number of holes, formally described by the Euler characteristic, is a topological invariant insensitive to smooth deformation of the shape and size of an object. In condensed matter physics, we study an analogue of pastry, the Fermi sea. Nature…

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Please join for this special reunion event which will prove to be memorable!

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I will discuss some applications of brane constructions of rational integrable spin chains with Verma modules. These spin chains appear in various gauge theories. They can be created in 4d Chern-Simons theories with line operators, mapped to massive vacua of certain 2d N=(2,2) gauge theories using Bethe/Gauge correspondences, described in terms…

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Following the first detection of a binary black hole merger in 2015, the number of gravitational wave events has grown to almost one hundred, including binary neutron star mergers and mixed black hole, neutron star mergers. Going forward, the next few years should bring a wealth of new discoveries, including several more neutron star mergers…

Quantum geometry, namely quantities such as quantum metric, Berry curvature, and Chern number, have become increasingly important in understanding interacting many-body systems. We have shown that supercurrents and superfluidity in a flat band are governed by quantum geometry [1], which opens new prospects…

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NIST is using atomically precise fabrication to make single atom transistors, few-donor/quantum dot devices, and arrayed few-donor devices for analog quantum simulation (AQS). The goal of the AQS experiments is to explore the Hubbard phase space by fabricating atomically engineered materials whose properties, such as…

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Shedding nano-light on quantum materials

D.N. Basov, Columbia University, https://infrared.cni.columbia.edu

In this talk, I will describe two recent experiments harnessing nano-scale polaritonic waves (“nano-light”) for probing excitonic…

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Based on 2203.09537. In the context of toy models of holography arising from 3d Chern-Simons theory, I will describe an approach in which, rather than summing over bulk geometries, one gauges a one-form global symmetry of the bulk theory. This ensures that the bulk theory has no global symmetries, and it makes the partition function on…

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For quantum computers to achieve their promise, regardless of the qubit technology, significant improvements to both performance and scale are required. Quantum-dot-based qubits in silicon have recently enjoyed dramatic advances in fabrication and control techniques. The “exchange-only” modality is of particular interest, as it avoids control…

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Scattering amplitudes are the arena where quantum field theory directly meets collider experiments. An excellent model for scattering in QCD is provided by N=4 super-Yang-Mills theory, particularly in the planar limit of a large number of colors, where the theory becomes integrable, and amplitudes become dual to light-like polygonal Wilson…

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**THIS SEMINAR WILL BE RESCHEDULED AT A LATER DATE.**

We will discuss the price of the quantum error correcting codes, defined as the number of physical qubits needed to reconstruct whether a given operator has been acted upon the thermal state or not. By thinking about reconstruction via quantum teleportation…

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There has been exciting recent progress in the study of the quantum nature of black holes through the use of certain exactly solvable models. This work shows how to realize, in concrete terms, various long-held expectations about quantum gravity, such as the transition from describing physics in terms of smooth spacetimes to a description in…

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Cosmologists are proud of the standard cosmological model that has been developed to account for a wealth of disparate features of the Universe. The model requires, though, that we postulate the existence of some collisionless dark matter and also dark energy, a negative-pressure substance. The nature of both of these dark constituents is a…

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