Cited by 160Quantum many-body systemsQuantum Computing Algorithms and ArchitectureQuantum Mechanics and Applications

The DOI matches its Crossref record; 45 of the 45 references it cites were found in a registry or an index; none of the 6 sources its claims cite is checked for support yet.

Quantum Simulation of Generic Many-Body Open System Dynamics Using Classical Noise

Open access
Chenu, A., Beau, M., Cao, J., del Campo, A.·2017·Physical Review Letters

Abstract

We introduce a scheme for the quantum simulation of many-body decoherence based on the unitary evolution of a stochastic Hamiltonian. Modulating the strength of the interactions with stochastic processes, we show that the noise-averaged density matrix simulates an effectively open dynamics governed by k-body Lindblad operators. Markovian dynamics can be accessed with white-noise fluctuations; non-Markovian dynamics requires colored noise. The time scale governing the fidelity decay under many-body decoherence is shown to scale as N^{-2k} with the system size N. Our proposal can be readily implemented in a variety of quantum platforms including optical lattices, superconducting circuits, and trapped ions.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

The paper proposes simulating many-body open-system dynamics by adding classical stochastic noise to the coupling constants of a unitary quantum simulator. Averaging over noise realizations produces an effective master equation with many-body Lindblad operators, with white noise giving Markovian dynamics and colored noise enabling non-Markovian dynamics.

Key findings

  • The noise-averaged density matrix evolves under a master equation whose dissipator contains many-body Lindblad operators inherited from the stochastic terms in the simulator Hamiltonian.
  • For white noise, the dissipator takes diagonal Lindblad form; for real white noise it becomes unital and purity decays monotonically.
  • The decoherence time scales as \(N^{-2k}\) for \(N\) particles and \(k\)-body interactions, with the bound \(1/\tau_D \le \binom{N}{k}^2 \sum_\alpha \gamma_\alpha \|L^{(\alpha,k)}\|^2/4 \sim N^{2k}/k!^2 \sum_\alpha \gamma_\alpha \|L^{(\alpha,k)}\|^2/4\).
  • In the long-range Ising example, \(\tau_D \sim 1/N^2\) for a product state and \(\tau_D \sim 1/N^4\) for maximally entangled states, where the bound is saturated.

Methods

  • Theoretical quantum-simulation proposal: a target many-body Hamiltonian is supplemented by stochastic terms \(\sum_\alpha \lambda_\alpha(t) L_\alpha\), with Gaussian noise fields and coupling strengths \(\lambda_\alpha(t)=\hbar\sqrt{\gamma_\alpha}\,\eta_\alpha(t)\).
  • The noise-averaged dynamics is derived using Novikov’s theorem; the Markovian limit is obtained with white noise, while non-Markovian dynamics is treated perturbatively to second order in noise strength using colored noise.
  • Two illustrative platforms are discussed: a Bose-Hubbard model in an optical lattice with stochastic on-site interaction, and a long-range transverse-field Ising chain with stochastic spin-spin couplings.

Limitations

  • The paper states that solving the non-Markovian master equation requires stochastic unraveling or perturbative schemes, and the explicit non-Markovian treatment is second order in noise strength.
  • The scheme assumes Hermitian simulator and target Hamiltonians; implementing non-Hermitian stochastic terms is stated to be outside its scope.
  • Evident from the text: the work is a theoretical proposal without experimental demonstration or numerical simulations, and it relies on Gaussian, independent noise processes and permutation-symmetric \(k\)-body Lindblad operators.

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Integrity signals

Registry

Crossref · 10.1103/physrevlett.118.140403

Cites

45 of 45 references verified0 citation errors · 0 not checkable

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Verification

Claims the paper makes

11 No basis given · 10 Own interpretation · 5 Not checked yet

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  • It may state two separate claims as one. 7
  • The quote only partly states this claim. 1
  • Probably not a substantial claim. 1
8 of 8
  • The authors state this as an assumption.

    The initial state is deterministically prepared in a pure state at t = 0.

    “Assuming the initial state to be deterministically prepared in a pure state jψð0Þi at t ¼ 0, the fidelity simply reads FðtÞ ¼ hψð0ÞjρðtÞjψð0Þi ¼ cos 2 L½ρð0Þ; ρðtÞ.”
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Citations

Cites

Research works printed but not linked: 1

  1. E. A. Novikov, 1965, JETP, 20, 1290

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Metadata

Authors
Chenu, A., Beau, M., Cao, J., & del Campo, A.
Affiliations
  • Massachusetts Institute of Technology (US)
  • University of Massachusetts Boston (US)
Venue
Physical Review Letters
Published
2017-04-05
Volume
118
Issue
14
Pages
140403-140403
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2604247548
Cited by
160
References
45
Citations by year
2026: 11 · 2025: 31 · 2024: 19 · 2023: 15 · 2022: 17 · 2021: 18 · 2020: 14 · 2019: 10 · 2018: 14 · 2017: 11
FWCI
6.57
Type
journal article
Language
en
Open access
Locations
  • Physical Review Letters (publishedVersion)
  • arXiv (Cornell University) (publishedVersion)
  • PubMed (publishedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
  • arXiv (Cornell University)
Funders
  • John Templeton Foundation
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
  • National Science Foundation (CHE-1112825)
  • UMass Boston (P20150000029279)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
Keywords
quantum simulation, open quantum systems, stochastic Hamiltonian, Lindblad operators, non-Markovian dynamics, colored noise, white noise, fidelity decay, system size scaling, hybrid quantum-classical simulation

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