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Title

Boosting the performance of small autonomous refrigerators via common environmental effects

AuthorsManzano, Gonzalo CSIC ORCID; Giorgi, Gian Luca CSIC ORCID ; Fazio, Rosario; Zambrini, Roberta CSIC ORCID
Issue Date16-Dec-2019
PublisherIOP Publishing
CitationNew Journal of Physics 21: 123026 (2019)
AbstractWe explore the possibility of enhancing the performance of small thermal machines by the presence of common noise sources. In particular, we study a prototypical model for an autonomous quantum refrigerator comprised by three qubits coupled to thermal reservoirs at different temperatures. Our results show that engineering the coupling to the reservoirs to act as common environments lead to relevant improvements in the performance. The enhancements arrive to almost double the cooling power of the original fridge without compromising its efficiency. The greater enhancements are obtained when the refrigerator may benefit from the presence of a decoherence-free subspace. The influence of coherent effects in the dissipation due to one- and two-spin correlated processes is also examined by comparison with an equivalent incoherent yet correlated model of dissipation.
Publisher version (URL)http://doi.org/10.1088/1367-2630/ab5c58
URIhttp://hdl.handle.net/10261/205072
DOI10.1088/1367-2630/ab5c58
Identifiersdoi: 10.1088/1367-2630/ab5c58
e-issn: 1367-2630
Appears in Collections:(IFISC) Artículos

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