2020
DOI: 10.22331/q-2020-12-24-377
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Multi-spin counter-diabatic driving in many-body quantum Otto refrigerators

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 b… Show more

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Cited by 23 publications
(24 citation statements)
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References 69 publications
(107 reference statements)
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“…Similar studies looked at thermodynamic cycles with STA in multiferroic material 177 , harmonic oscillators 178,179 , anyonic working mediums 109 , BECs with nonlinear interactions 175 , spin-1/2 systems [180][181][182] , superconducting qubits 183 , and multi-spin systems 184,185 as working mediums. More recently, techniques from machine learning have been employed to find optimal STA 186,187 .…”
Section: Optimized Engine Cycles: Shortcuts To Adiabaticitymentioning
confidence: 99%
“…Similar studies looked at thermodynamic cycles with STA in multiferroic material 177 , harmonic oscillators 178,179 , anyonic working mediums 109 , BECs with nonlinear interactions 175 , spin-1/2 systems [180][181][182] , superconducting qubits 183 , and multi-spin systems 184,185 as working mediums. More recently, techniques from machine learning have been employed to find optimal STA 186,187 .…”
Section: Optimized Engine Cycles: Shortcuts To Adiabaticitymentioning
confidence: 99%
“…To overcome this challenge a variational method was proposed to obtain an approximate CD term [46]. And, many recent work shows the advantage of using variationally calculated local CD terms for different applications [22,47,48].…”
Section: Digitized-counterdiabatic Quantum Computingmentioning
confidence: 99%
“…There are a number of efforts in the literature that considers coupled spin systems as working mediums of a quantum Otto engine or refrigerator [42][43][44][45][46]. However, there are only a few works considering a STA scheme in working substances with such composite spin systems [31,38,47]. In what follows, we will first identify the parameter regions for which our system operates as a quantum Otto engine and then apply a STA protocol using the parameter set for which we have the maximum work output.…”
Section: Two-spin Enginementioning
confidence: 99%