期刊
QUANTUM
卷 1, 期 -, 页码 -出版社
VEREIN FORDERUNG OPEN ACCESS PUBLIZIERENS QUANTENWISSENSCHAF
DOI: 10.22331/q-2017-12-11-37
关键词
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资金
- Ministry of Education, Singapore
- National Research Foundation, Prime Ministers Office, Singapore, under the Research Centres of Excellence Programme [NRF-CRP12-2013-03]
- National Research Foundation, Prime Ministers Office, Singapore, through the Competitive Research Programme [NRF-CRP12-2013-03]
We study the quantum and classical evolution of a system of three harmonic modes interacting via a trilinear Hamiltonian. With the modes prepared in thermal states of different temperatures, this model describes the working principle of an absorption refrigerator that transfers energy from a cold to a hot environment at the expense of free energy provided by a high-temperature work reservoir. Inspired by a recent experimental realization with trapped ions, we elucidate key features of the coupling Hamiltonian that are relevant for the refrigerator performance. The coherent system dynamics exhibits rapid effective equilibration of the mode energies and correlations, as well as a transient enhancement of the cooling performance at short times. We find that these features can be fully reproduced in a classical framework.
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