Results 21 to 30 of about 71,366,600 (306)
Control of superexchange interactions with DC electric fields
Physical Review Research, 2021 We discuss DC electric-field controls of superexchange interactions. We first present generic results about antiferromagnetic and ferromagnetic superexchange interactions valid in a broad class of Mott insulators, where we also estimate typical field ...
Shunsuke C. Furuya +2 more
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Learning lattice quantum field theories with equivariant continuous flows
SciPost Physics, 2023 We propose a novel machine learning method for sampling from the high-dimensional probability distributions of Lattice Field Theories, which is based on a single neural ODE layer and incorporates the full symmetries of the problem. We test our model on the \phi^4
Gerdes, M. +4 more
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From Spinon Band Topology to the Symmetry Quantum Numbers of Monopoles in Dirac Spin Liquids
Physical Review X, 2020 The interplay of symmetry and topology has been at the forefront of recent progress in quantum matter. Here, we uncover an unexpected connection between band topology and the description of competing orders in a quantum magnet. Specifically, we show that
Xue-Yang Song +3 more
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APL Materials, 2020 We highlight recent advances in the theory, materials fabrication, and experimental characterization of strongly correlated and topological states in [111] oriented transition metal oxide thin films and heterostructures, which are notoriously difficult ...
Jak Chakhalian +2 more
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Quantum mean estimation for lattice field theory
Physical Review D, 2023 We demonstrate the quantum mean estimation algorithm on Euclidean lattice field theories. This shows a quadratic advantage over Monte Carlo methods which persists even in presence of a sign problem, and is insensitive to critical slowing down. The algorithm is used to compute $π$ with and without a sign problem, a toy U(1) gauge theory model, and the ...
Erik J. Gustafson +2 more
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Review on Quantum Computing for Lattice Field Theory
Proceedings of The 39th International Symposium on Lattice Field Theory — PoS(LATTICE2022), 2023 In these proceedings, we review recent advances in applying quantum computing to lattice field theory. Quantum computing offers the prospect to simulate lattice field theories in parameter regimes that are largely inaccessible with the conventional Monte Carlo approach, such as the sign-problem afflicted regimes of finite baryon density, topological ...
Funcke, Lena +3 more
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Topics in quantum gravity and quantum field theory [PDF]
, 2022 In this thesis, we analyse three different quantum systems via operator and path integral techniques: 'two-dimensional Causal-Dynamical-Triangulations (CDT) coupled to hard-dimers', 'scalar solitons' and `Quantum Random Walks (QRW) on the Cayley tree ...
Xavier, Praveen
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Taking Particle Physics Seriously: a Critique of the Algebraic Approach to Quantum Field Theory [PDF]
, 2011 I argue against the currently-prevalent view in philosophy of physics that algebraic quantum field theory (AQFT) is the correct framework for philosophy of quantum field theory and that "conventional" quantum field theory (CQFT), of the sort used in ...
Wallace, David +2 more
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SciPost Physics, 2017 Using quantum Monte Carlo simulations, we compute the participation (Shannon-R\'enyi) entropies for groundstate wave functions of Heisenberg antiferromagnets for one-dimensional (line) subsystems of length $L$ embedded in two-dimensional ($L\times L$)
David J. Luitz, Nicolas Laflorencie
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Quantum Finite Elements for Lattice Field Theory [PDF]
Proceedings of The 33rd International Symposium on Lattice Field Theory — PoS(LATTICE 2015), 2016 Viable non-perturbative methods for lattice quantum field theories on curved manifolds are difficult. By adapting features from the traditional finite element methods (FEM) and Regge Calculus, a new simplicial lattice Quantum Finite Element (QFE) Lagrangian is constructed for fields on a smooth Riemann manifold.
Brower, Richard C. +5 more
openaire +2 more sources