Journal
NEW JOURNAL OF PHYSICS
Volume 17, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/17/11/115013
Keywords
absorption refrigerator; quantum mechanics; quantum coherence; thermodynamics; heat engine
Categories
Funding
- UK EPSRC via the Controlled Quantum Dynamics CDT
- Singaporean Ministry of Education, Tier 3 Grant Random numbers from quantum processes [MOE2012-T3-1-009]
- Spanish Ministerio de Economia y Competitividad [FIS2012-30625]
- Juan de la Cierva fellowship [JCI 2012-14155]
- European Commission (STREP 'RAQUEL')
- Spanish MINECO Project [FIS2013-40627-P]
- Generalitat de Catalunya CIRIT Project [2014 SGR 966]
- EPSRC
- Engineering and Physical Sciences Research Council [1102898] Funding Source: researchfish
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The extension of thermodynamics into the quantum regime has received much attention in recent years. A primary objective of current research is to find thermodynamic tasks which can be enhanced by quantum mechanical effects. With this goal in mind, we explore the finite-time dynamics of absorption refrigerators composed of three quantum bits (qubits). The aim of this finite-time cooling is to reach low temperatures as fast as possible and subsequently extract the cold particle to exploit it for information processing purposes. We show that the coherent oscillations inherent to quantum dynamics can be harnessed to reach temperatures that are colder than the steady state in orders of magnitude less time, thereby providing a fast source of low-entropy qubits. This effect demonstrates that quantum thermal machines can surpass classical ones, reminiscent of quantum advantages in other fields, and is applicable to a broad range of technologically important scenarios.
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