Simulation of Nonequilibrium Dynamics on a Quantum Computer

Henry Lamm and Scott Lawrence
Phys. Rev. Lett. 121, 170501 – Published 22 October 2018

Abstract

We present a hybrid quantum-classical algorithm for the time evolution of out-of-equilibrium thermal states. The method depends on classically computing a sparse approximation to the density matrix and, then, time-evolving each matrix element via the quantum computer. For this exploratory study, we investigate a time-dependent Ising model with five spins on the Rigetti Forest quantum virtual machine and a one spin system on the Rigetti 8Q-Agave quantum processor.

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  • Received 21 June 2018
  • Revised 6 September 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.170501

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & ThermodynamicsQuantum Information, Science & Technology

Authors & Affiliations

Henry Lamm* and Scott Lawrence

  • Department of Physics, University of Maryland, College Park, Maryland 20742, USA

  • *hlamm@umd.edu
  • srl@umd.edu

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Issue

Vol. 121, Iss. 17 — 26 October 2018

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