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SAMOP 2021 – scientific programme

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QI: Fachverband Quanteninformation

QI 7: Quantum Information: Applications

QI 7.3: Talk

Wednesday, September 22, 2021, 11:15–11:30, H4

Superradiant many-qubit absorption refrigeratorMichal Kloc1, Kurt Meier1, Kimon Hadjikyriakos2, and •Gernot Schaller31Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland — 2Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — 3Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany

We show that the lower levels of a large-spin network with a collective anti-ferromagnetic interaction and collective couplings to three reservoirs may function as a quantum absorption refrigerator. In appropriate regimes, the steady-state cooling current of this refrigerator scales quadratically with the size of the working medium, i.e., the number of spins. The same scaling is observed for the noise and the entropy production rate.

[1] arXiv:2106.04164

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