Universal quantum Otto heat machine based on the Dicke model
- URL: http://arxiv.org/abs/2308.06664v1
- Date: Sun, 13 Aug 2023 02:27:17 GMT
- Title: Universal quantum Otto heat machine based on the Dicke model
- Authors: He-Guang Xu, Jiasen Jin, G.D.M. Neto and Norton G. de Almeida
- Abstract summary: We study a quantum Otto thermal machine where the working substance is composed of N identical qubits coupled to a single mode of a bosonic field.
We show that it is possible to build a universal quantum heat machine (UQHM) that can function as an engine, refrigerator, heater or accelerator.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: In this paper we study a quantum Otto thermal machine where the working
substance is composed of N identical qubits coupled to a single mode of a
bosonic field, where the atoms and the field interact with a reservoir, as
described by the so-called open Dicke model. By controlling the relevant and
experimentally accessible parameters of the model we show that it is possible
to build a universal quantum heat machine (UQHM) that can function as an
engine, refrigerator, heater or accelerator. The heat and work exchanges are
computed taking into account the growth of the number N of atoms as well as the
coupling regimes characteristic of the Dicke model for several ratios of
temperatures of the two thermal reservoirs. The analysis of quantum features
such as entanglement and second-order correlation shows that these quantum
resources do not affect either the efficiency or the performance of the UQHM
based on the open Dicke Model. In addition, we show that the improvement in
both efficiency and coefficient of performance of our UQHM occurs for regions
around the critical value of the phase transition parameter of the model.
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