Results 221 to 230 of about 22,489 (262)

Strong magnon-photon coupling enhanced by photonic lattice flat-bands. [PDF]

Nat Commun
Hong Q, Qian J, Chen F, Yang Y, Wang YP.
europepmc   +1 more source

Quantum algorithms for open lattice field theory [PDF]

Physical Review A, 2021
Certain aspects of some unitary quantum systems are well-described by evolution via a non-Hermitian effective Hamiltonian, as in the Wigner-Weisskopf theory for spontaneous decay. Conversely, any non-Hermitian Hamiltonian evolution can be accommodated in a corresponding unitary system + environment model via a generalization of Wigner-Weisskopf theory.
Judah Unmuth-Yockey, Bharath Sambasivam, Jay Hubisz   +2 more
exaly   +3 more sources

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 ...
Judah Unmuth-Yockey, Henry Lamm, Erik Gustafson   +2 more
exaly   +3 more sources

fcc lattice, checkerboards, fractons, and quantum field theory [PDF]

Physical Review B, 2021
We consider XY-spin degrees of freedom on an fcc lattice, such that the system respects some subsystem global symmetry. We then gauge this global symmetry and study the corresponding $U(1)$ gauge theory on the fcc lattice. Surprisingly, this $U(1)$ gauge theory is dual to the original spin system.
Pranay Gorantla, Shu-Heng Shao, Ho Tat Lam   +2 more
exaly   +2 more sources

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Tensor lattice field theory for renormalization and quantum computing

Reviews of Modern Physics, 2022
Judah Unmuth-Yockey, Ryo Sakai, Yannick Meurice   +2 more
exaly   +2 more sources

Quantum Field Theory (QFT) on the Lattice

2016
In 1964, Gell-Mann [1] and Zweig [2] proposed that hadrons, the particles which experience strong interactions, are made of quarks. Quarks are confined within hadrons and never seen in isolation. Electron-nucleon scattering experiments at large momentum transfer could be explained by assuming the nucleon is made of almost-free point-like constituents ...
Francesco Knechtli, Michael Günther, Michael Peardon   +2 more
openaire   +1 more source

MCMC and Quantum Field Theories on a Lattice

2020
We can consider relativistic quantum field theory as the quantum mechanics of fields defined on a spacetime. A field has infinite number of degrees of freedom since it can take a value at every point in spacetime.
openaire   +1 more source

Scattering and Bound States in Euclidean Lattice Quantum Field Theories

Annales Henri Poincaré, 2001
The problem of asymptotic completeness (AC) is the question whether all pure states can be interpreted in terms of scattering states of particles. The authors study here the two-body AC in massive Euclidean lattice quantum field theories. Schwinger \(n\)-point functions \(S_n(x_1,\dots, x_n)\), \(x_i\in \mathbb{Z}^{d+1}\) with \(d\geq 1\), and Bethe ...
Auil, F., Barata, J. C. A.
openaire   +1 more source

A quantum field theory of melting and lattice dynamics

Physica A: Statistical Mechanics and its Applications, 1986
Abstract The melting and the lattice dynamics are investigated from the view-point of a quantum field theory at finite temperature (thermo field theory). Our theory starts with ion cores and valence electrons interacting with each other as the first principle.
openaire   +1 more source