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

• Main Authors: Beau, M. (Author), del Campo, A. (Author), Chenu, Aurelia (Contributor), Cao, Jianshu (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Chemistry (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2017-04-06T18:44:18Z.
• Subjects: Article
• Online Access: Get fulltext

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[superscript -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.
University of Massachusetts at Boston (Project P20150000029279)
Templeton Foundation
Swiss National Science Foundation
National Science Foundation (U.S.) (Grant CHE-1112825)