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The smallest refrigerators can reach maximal efficiency

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arxiv 1009.0865 v2 pith:OCJ4DWFU submitted 2010-09-04 quant-ph

classification quant-ph
keywords efficiencyreachsizesmallanalyseanalyticallycarnotcomplementarity
verification ladder T0 review T1 audit T2 compute T3 formal
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We investigate whether size imposes a fundamental constraint on the efficiency of small thermal machines. We analyse in detail a model of a small self-contained refrigerator consisting of three qubits. We show analytically that this system can reach the Carnot efficiency, thus demonstrating that there exists no complementarity between size and efficiency.

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