Experimental investigation of a quantum heat engine powered by generalized measurements

V. F. Lisboa, P. R. Dieguez, J. R. Guimarães, J. F. G. Santos, and R. M. Serra
Phys. Rev. A 106, 022436 – Published 29 August 2022

Abstract

Generalized measurements may allow the control of its back-action on the quantum system by interpolating from a very weak to strong projective action. Such a measurement can fuel a quantum heat engine or extract work depending on the system-meter interaction. Here, we performed a proof-of-concept experiment using nuclear magnetic resonance techniques to investigate a spin quantum heat engine driven by nonselective generalized (weak) measurements without feedback control. Our prototype of a quantum thermal device operates with a measurement protocol and a single heat bath. The protocol is composed of two nonselective measurement channels with variable measurement strengths; one dedicated to fueling the device (analogous to a hot heat source) and the other committed to work extraction. The experimental results highlight that this kind of quantum thermal device can reach unit efficiency with maximum extracted power by fine-tuning of the measurement strengths.

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  • Received 1 April 2022
  • Accepted 12 August 2022

DOI:https://doi.org/10.1103/PhysRevA.106.022436

©2022 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

V. F. Lisboa1, P. R. Dieguez2,1,*, J. R. Guimarães1,3, J. F. G. Santos1,4, and R. M. Serra1,5,†

  • 1Center for Natural and Human Sciences, Federal University of ABC, Avenida dos Estados 5001, 09210-580, Santo André, São Paulo, Brazil
  • 2International Centre for Theory of Quantum Technologies (ICTQT), University of Gdańsk, Jana Bazynskiego 8, 80-309 Gdańsk, Poland
  • 3Peter Grünberg Institute, Institute for Functional Quantum Systems (PGI-13), Forschungszentrum Jülich, North Rhine-Westphalia, 52425 Jülich, Germany
  • 4Division of Natural and Applied Sciences, Duke Kunshan University, Kunshan, Jiangsu 215300, China
  • 5Department of Physics, Zhejiang Normal University, Jinhua 321004, China

  • *dieguez.pr@gmail.com
  • serra@ufabc.edu.br

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Issue

Vol. 106, Iss. 2 — August 2022

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