Thermal entanglement and efficiency of the quantum Otto cycle for the su(1,1) Tavis-Cummings system
L. Chotorlishvili, Z. Toklikishvili, J. Berakdar
TL;DR
This paper investigates how the dynamical Stark shift affects thermal entanglement and efficiency in a quantum Otto cycle based on the su(1,1) Tavis-Cummings system, revealing a trade-off between entanglement enhancement and efficiency reduction.
Contribution
It provides analytical expressions for the efficiency of the quantum Otto cycle considering the dynamical Stark shift and identifies the maximal efficiency from experimental data.
Findings
Thermal entanglement increases with the Stark shift.
Efficiency of the Otto cycle decreases as the Stark shift increases.
Derived formulas enable estimation of maximal efficiency from experimental Stark shift measurements.
Abstract
The influence of the dynamical Stark shift on the thermal entanglement and the efficiency of the quantum Otto cycle is studied for the su(1,1) Tavis-Cummings system. It is shown that the degree of the thermal entanglement becomes larger as the dynamical Stark shift increases. In contrast, the efficiency of the Otto cycle is degraded with an increase of the values of dynamical Stark shift. Expressions for the efficiency coefficient are derived. Using those expressions we identify the maximal efficiency of the quantum Otto cycle from the experimentally measured values of the dynamical Stark shift
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