Quantum absorption refrigerator with trapped ions

Gleb Maslennikov, Shiqian Ding, Roland Hablützel, Jaren Gan, Alexandre Roulet, Stefan Nimmrichter, Jibo Dai, Valerio Scarani and Dzmitry Matsukevich ()
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Gleb Maslennikov: National University of Singapore
Shiqian Ding: National University of Singapore
Roland Hablützel: National University of Singapore
Jaren Gan: National University of Singapore
Alexandre Roulet: National University of Singapore
Stefan Nimmrichter: National University of Singapore
Jibo Dai: National University of Singapore
Valerio Scarani: National University of Singapore
Dzmitry Matsukevich: National University of Singapore

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract In recent years substantial efforts have been expended in extending thermodynamics to single quantum systems. Quantum effects have emerged as a resource that can improve the performance of heat machines. However in the fully quantum regime their implementation still remains a challenge. Here, we report an experimental realization of a quantum absorption refrigerator in a system of three trapped ions, with three of its normal modes of motion coupled by a trilinear Hamiltonian such that heat transfer between two modes refrigerates the third. We investigate the dynamics and steady-state properties of the refrigerator and compare its cooling capability when only thermal states are involved to the case when squeezing is employed as a quantum resource. We also study the performance of such a refrigerator in the single shot regime made possible by coherence and demonstrate cooling below both the steady-state energy and a benchmark set by classical thermodynamics.

Date: 2019
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DOI: 10.1038/s41467-018-08090-0

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