Scientific article
OA Policy
English

Small quantum absorption refrigerator in the transient regime: time scales, enhanced cooling and entanglement

Publication date2015
Abstract

A small quantum absorption refrigerator, consisting of three qubits, is discussed in the transient regime. We discuss time scales for coherent dynamics, damping, and approach to the steady state, and we study cooling and entanglement. We observe that cooling can be enhanced in the transient regime, in the sense that lower temperatures can be achieved compared to the steady-state regime. This is a consequence of coherent dynamics, but can occur even when this dynamics is strongly damped by the dissipative thermal environment, and we note that precise control over couplings or timing is not needed to achieve enhanced cooling. We also show that the amount of entanglement present in the refrigerator can be much larger in the transient regime compared to the steady-state. These results are of relevance to future implementations of quantum thermal machines.

Note8 pages, 5 figures
Research groups
Citation (ISO format)
BRASK, Jonatan, BRUNNER, Nicolas. Small quantum absorption refrigerator in the transient regime: time scales, enhanced cooling and entanglement. In: Physical review. E, Statistical, nonlinear, and soft matter physics, 2015, vol. 92, n° 062101. doi: 10.1103/PhysRevE.92.062101
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Article (Accepted version)
accessLevelPublic
Identifiers
Journal ISSN1539-3755
603views
335downloads

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Creation10/06/2016 14:53:00
First validation10/06/2016 14:53:00
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