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Quantum Refrigeration with Indefinite Causal Order. | LitMetric

Quantum Refrigeration with Indefinite Causal Order.

Phys Rev Lett

Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, England.

Published: August 2020

AI Article Synopsis

Article Abstract

We propose a thermodynamic refrigeration cycle which uses indefinite causal orders to achieve nonclassical cooling. The cycle cools a cold reservoir while consuming purity in a control qubit. We first show that the application to an input state of two identical thermalizing channels of temperature T in an indefinite causal order can result in an output state with a temperature not equal to T. We investigate the properties of the refrigeration cycle and show that thermodynamically, the result is compatible with unitary quantum mechanics in the circuit model but could not be achieved classically. We believe that this cycle could be implemented experimentally using tabletop photonics. Our result suggests the development of a new class of thermodynamic resource theories in which operations are allowed to be performed in an indefinite causal order.

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Source
http://dx.doi.org/10.1103/PhysRevLett.125.070603DOI Listing

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