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Digital Quantum Simulation of Open Quantum Systems Using Quantum Imaginary–Time Evolution

Kamakari, Hirsh and Sun, Shi-Ning and Motta, Mario and Minnich, Austin J. (2022) Digital Quantum Simulation of Open Quantum Systems Using Quantum Imaginary–Time Evolution. PRX Quantum, 3 (1). Art. No. 010320. ISSN 2691-3399. doi:10.1103/prxquantum.3.010320.

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Quantum simulation on emerging quantum hardware is a topic of intense interest. While many studies focus on computing ground-state properties or simulating unitary dynamics of closed systems, open quantum systems are an interesting target of study owing to their ubiquity and rich physical behavior. However, their nonunitary dynamics are also not natural to simulate on digital quantum devices. Here, we report algorithms for the digital quantum simulation of the dynamics of open quantum systems governed by a Lindblad equation using adaptations of the quantum imaginary–time evolution algorithm. We demonstrate the algorithms on IBM Quantum’s hardware with simulations of the spontaneous emission of a two-level system and the dissipative transverse field Ising model. Our work advances efforts to simulate the dynamics of open quantum systems on quantum hardware.

Item Type:Article
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URLURL TypeDescription Paper
Kamakari, Hirsh0000-0002-5377-9631
Sun, Shi-Ning0000-0002-5984-780X
Motta, Mario0000-0003-1647-9864
Minnich, Austin J.0000-0002-9671-9540
Alternate Title:Digital quantum simulation of open quantum systems using quantum imaginary time evolution
Additional Information:© 2022 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. (Received 7 June 2021; accepted 11 January 2022; published 4 February 2022) H.K., S.-N.S., and A.J.M. are supported by the NSF under Grant No. 1839204.
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Issue or Number:1
Record Number:CaltechAUTHORS:20220208-948217000
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113332
Deposited By: George Porter
Deposited On:08 Feb 2022 20:35
Last Modified:08 Feb 2022 20:35

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