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

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Jonatan Bohr Brask, Nicolas Brunner

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.

References

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Citations

Dec 9, 2017·Physical Review Letters·Kay BrandnerUdo Seifert
Mar 17, 2017·Physical Review. E·Tatsuro YugeTetsuo Ogawa
Jan 16, 2019·Nature Communications·Gleb MaslennikovDzmitry Matsukevich
Sep 28, 2017·Physical Review Letters·Patrick P HoferNicolas Brunner
Jan 23, 2020·Physical Review. E·Hava Meira Friedman, Dvira Segal
Aug 17, 2018·Physical Review. E·Stella SeahValerio Scarani
Aug 3, 2019·The Journal of Chemical Physics·Viktor Holubec, Tomáš Novotný
Jul 25, 2019·Physical Review. E·J Onam GonzálezLuis A Correa
Jul 22, 2020·Physical Review. E·Varinder SinghRamandeep S Johal
Jul 18, 2018·Physical Review. E·Chiranjib MukhopadhyayArun Kumar Pati
May 22, 2019·Physical Review. E·Gonzalo ManzanoJuan M R Parrondo
Jun 23, 2021·Scientific Reports·Onat Arısoy, Özgür E Müstecaplıoğlu
Jun 18, 2021·Physical Review. E·Zhuolin Ye, Viktor Holubec

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