Multi-spin counter-diabatic driving in many-body quantum Otto refrigerators

• URL: http://arxiv.org/abs/2008.09327v2
• Date: Mon, 21 Dec 2020 16:06:53 GMT
• Title: Multi-spin counter-diabatic driving in many-body quantum Otto refrigerators
• Authors: Andreas Hartmann, Victor Mukherjee, Glen Bigan Mbeng, Wolfgang Niedenzu, Wolfgang Lechner
• Abstract summary: We present a finite-time many-body quantum refrigerator that yields finite cooling power at high coefficient of performance. We employ multi-spin CD driving and numerically investigate the scaling behavior of the refrigeration performance with system size.
• Score: 0.16799377888527683
• License: http://creativecommons.org/licenses/by/4.0/
• 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.

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