Testing a quantum heat pump with a two-level spin

Correa, Luis A. and Mehboudi, Mohammad (2016) Testing a quantum heat pump with a two-level spin. Entropy, 18 (4). p. 141. ISSN 1099-4300

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Abstract

Once in its non-equilibrium steady state, a nanoscale system coupled to several heat baths may be thought of as a “quantum heat pump”. Depending on the direction of its stationary heat flows, it may function as, e.g., a refrigerator or a heat transformer. These continuous heat devices can be arbitrarily complex multipartite systems, and yet, their working principle is always the same: they are made up of several elementary three-level stages operating in parallel. As a result, it is possible to devise external “black-box” testing strategies to learn about their functionality and performance regardless of any internal details. In particular, one such heat pump can be tested by coupling a two-level spin to one of its “contact transitions”. The steady state of this external probe contains information about the presence of heat leaks and internal dissipation in the device and, also, about the direction of its steady-state heat currents. Provided that the irreversibility of the heat pump is low, one can further estimate its coefficient of performance. These techniques may find applications in the emerging field of quantum thermal engineering, as they facilitate the diagnosis and design optimization of complex thermodynamic cycles.

Item Type: Article
Keywords: thermodynamics; open quantum systems; thermal engineering
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Mathematical Sciences
Identification Number: 10.3390/e18040141
Depositing User: Correa Marichal, Luis
Date Deposited: 04 Oct 2017 13:20
Last Modified: 14 Oct 2017 08:35
URI: http://eprints.nottingham.ac.uk/id/eprint/46870

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