Format results
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Good quantum LDPC codes and how to decode them
Shouzhen (Bailey) Gu - California Institute of Technology (Caltech)
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Uncertainty Relations for Metrology and Computation
Jake Bringewatt - University of Maryland, College Park
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Entanglement Renormalization Circuits for Chiral Topological Order
Su-Kuan Chu - University of Maryland, College Park
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The Power of ZX Calculus: Compiling Quantum Codes
Andrey Khesin - Massachusetts Institute of Technology (MIT)
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Quantum scars in quantum field theory
Annie Wei - Massachusetts Institute of Technology
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Cosmology from random entanglement
Stefano Antonini - University of Maryland, College Park
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Reductions from weak to strong simulation of quantum systems
Sergey Bravyi - IBM (United States)
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Spectral gap implies rapid mixing for commuting Hamiltonians
Angela Capel Cuevas - University of Cambridge
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What exactly does Bekenstein Bound?
Jinzhao Wang - ETH Zurich
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Good quantum LDPC codes and how to decode them
Shouzhen (Bailey) Gu - California Institute of Technology (Caltech)
The last few years have seen rapid progress in the development of quantum low-density parity-check (LDPC) codes. LDPC codes, defined by their constant weight check operators, can have much better parameters than their topological counterparts like the surface code. In particular, a series of pivotal… -
Uncertainty Relations for Metrology and Computation
Jake Bringewatt - University of Maryland, College Park
Uncertainty relations are a familiar part of any introductory quantum mechanics course. In this talk, I will summarize how uncertainty relations have been re-interpreted and re-expressed in the language of information theory, leading to connections with the geometry of quantum state space and the… -
Entanglement Renormalization Circuits for Chiral Topological Order
Su-Kuan Chu - University of Maryland, College Park
Entanglement renormalization circuits are quantum circuits that can be used to prepare large-scale entangled states. For years, it has remained a mystery whether there exist scale-invariant entanglement renormalization circuits for chiral topological order. In this paper, we solve this problem by… -
The Power of ZX Calculus: Compiling Quantum Codes
Andrey Khesin - Massachusetts Institute of Technology (MIT)
Quantum error-correcting codes are a key pillar of quantum computing. They allow for the recovery of quantum information in the presence of noise. There are three main ways to depict a quantum code: by the list of codewords, by an encoding circuit, or by a stabilizer tableau. Although the latter is… -
Quantum scars in quantum field theory
Annie Wei - Massachusetts Institute of Technology
We develop the theory of quantum scars for quantum fields. By generalizing the formalisms of Heller and Bogomolny from few-body quantum mechanics to quantum fields, we find that unstable periodic classical solutions of the field equations imprint themselves in a precise manner on bands of energy… -
Non-abelian symmetries can increase entanglement and induce critical dynamics
Shayan Majidy - Harvard University
Measuring the temperature of your coffee should not change the amount of coffee in your cup. This holds because the operators representing the coffee’s energy and volume commute. The intuitive assumption that conserved quantities, also known as charges, commute, underpins basic physics derivations… -
Bosonic quantum sensing and communication in the presence of loss and noise - VIRTUAL
Squeezing has proven to be a powerful tool for suppressing noise in bosonic quantum sensing and communication. However, it is fragile and the resulting quantum advantage is extremely vulnerable to loss and noise. In this seminar, I will first overview the method of formulating loss and noise and… -
Exploring causality in braneworld/cutoff holography via holographic scattering
Takato Mori - Rikkyo University
Holography with branes and/or cutoff surfaces presents a promising approach to studying quantum gravity beyond asymptotically anti-de Sitter spacetimes. However, this generalized holography is known to face several inconsistencies, including potential violations of causality and fundamental entropic… -
Cosmology from random entanglement
Stefano Antonini - University of Maryland, College Park
Obtaining a description of cosmology is a central open problem in holography. Studying simple models can help us gain insight on the generic properties of holographic cosmologies. In this talk I will describe the construction of entangled microstates of a pair of holographic CFTs whose dual… -
Reductions from weak to strong simulation of quantum systems
Sergey Bravyi - IBM (United States)
Classical simulation techniques are widely used in quantum computation and condensed matter physics. In this talk I will describe algorithms for classically simulating measurement of an n-qubit quantum state in the standard basis, that is, sampling a bit string from the probability distribution… -
Spectral gap implies rapid mixing for commuting Hamiltonians
Angela Capel Cuevas - University of Cambridge
Quantum systems typically reach thermal equilibrium rather quickly when coupled to an external thermal environment. The usual way of bounding the speed of this process is by estimating the spectral gap of the dissipative generator. However, the gap, by itself, does not always yield a reasonable… -
What exactly does Bekenstein Bound?
Jinzhao Wang - ETH Zurich
The Bekenstein bound posits a maximum entropy for matter with finite energy confined to a spacetime region. It is often interpreted as a fundamental limit on the information that can be stored by physical objects. In this work, we test this interpretation by asking whether the Bekenstein bound…