Abstract
Quantum refrigerators pump heat from a cold to a hot reservoir. In the few-particle regime, counter-diabatic (CD) driving of, originally adiabatic, work-exchange strokes is a promising candidate to overcome the bottleneck of vanishing cooling power. Here, we present a finite-time many-body quantum refrigerator that yields finite cooling power at high coefficient of performance, that considerably outperforms its non-adiabatic counterpart. We employ multi-spin CD driving and numerically investigate the scaling behavior of the refrigeration performance with system size. We further prove that optimal refrigeration via the exact CD protocol is a catalytic process.
Highlights
Heat engines and refrigerators are a cornerstone of modern physics and indispensable in today’s society [1]
For the quantum refrigerator (QR) with single-body quantum working media (WM), we find an analytical expression for the coefficient of performance (CoP)
We have presented a many-body quantum Otto refrigerator that efficiently operates at finite-time
Summary
Heat engines and refrigerators are a cornerstone of modern physics and indispensable in today’s society [1]. Unravelling their fundamental laws in the few-particle regime has lead to the study of so-called quantum heat engines and refrigerators [2,3,4,5,6,7,8,9]. Whereas heat engines convert thermal energy into work, their counterparts, namely refrigerators, cool down a cold bath by pumping heat from the cold to the hot reservoir, thereby consuming work [7, 8, 20,21,22,23,24,25].
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