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Optimal quantum refrigeration in strained graphene

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arxiv 1809.08535 v2 pith:RHOQ5PFG submitted 2018-09-23 cond-mat.mes-hall physics.chem-phquant-ph

classification cond-mat.mes-hallphysics.chem-phquant-ph
keywords coolinggraphenequantumstrainedrefrigeratorrefrigeratorsregionsystem
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Refrigerators soak up heat energy from a low-temperature region and dump it into a higher temperature region using external work done on the system. Refrigerators are useful in cooling down a system to very low temperatures. In this letter, we show that a monolayer of strained graphene can be used in designing a quantum refrigerator with an excellent coefficient of performance and large cooling power. The operating point at which the strained graphene device works best as a quantum refrigerator is derived and the effects of strain and temperature on cooling are discussed.

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  1. Quantum Brayton Engine of Non-Interacting Fermions in a One-Dimensional Box

    cond-mat.stat-mech 2019-08 conditional novelty 4.0 of 10

    A quantum Brayton cycle with fermions in a one-dimensional box has an efficiency set by box-length ratios alone, independent of particle number, while power scales with the number of particles.

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