Occurrence of discontinuities in the performance of finite-time quantum Otto cycles

Yuanjian Zheng, Peter Hänggi, and Dario Poletti
Phys. Rev. E 94, 012137 – Published 25 July 2016

Abstract

We study a quantum Otto cycle in which the strokes are performed in finite time. The cycle involves energy measurements at the end of each stroke to allow for the respective determination of work. We then optimize for the work and efficiency of the cycle by varying the time spent in the different strokes and find that the optimal value of the ratio of time spent on each stroke goes through sudden changes as the parameters of this cycle vary continuously. The position of these discontinuities depends on the optimized quantity under consideration such as the net work output or the efficiency.

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  • Received 6 April 2016

DOI:https://doi.org/10.1103/PhysRevE.94.012137

©2016 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & Thermodynamics

Authors & Affiliations

Yuanjian Zheng1,2, Peter Hänggi3,4,5, and Dario Poletti1,6

  • 1Engineering Product Development Pillar, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
  • 2Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
  • 3Institut für Physik, Universität Augsburg, Universitätsstraße 1, D-86135 Augsburg, Germany
  • 4Nanosystems Initiative Munich, Schellingstr. 4, D-80799 München, Germany
  • 5Department of Physics, National University of Singapore, 117542 Singapore, Republic of Singapore
  • 6MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit, UMI 3654, Singapore

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Issue

Vol. 94, Iss. 1 — July 2016

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