Evaluating the performance of a refrigerator by an external system using entanglement

Khlifi, Y.; Allati, A. El; Salah, Ahmed; Hassouni, Y.

doi:10.1140/epjd/s10053-021-00211-7

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…It has been shown that quantum correlations in interacting systems can be generated and/or controlled by the collective effects of thermal baths [27,28], and also by the temperature gradient in the thermal baths which can lead to a heat current along the system [29][30][31]. Obviously, these quantum correlations can persist during the operation of the device and therefore influence the behaviour of thermal machines, improving or reducing their production capacity [11,[32][33][34][35]. In this context, recent results have highlighted an intrinsic connection between heat flows in quantum thermal machines and the correlation of their components, whether they are machines driven by external control protocols or autonomous machines [36,37].…”

Section: Introductionmentioning

confidence: 99%

On the coupling of three-level quantum refrigerators in the weak coupling limit

Abdou Chakour,

El Allati,

Hassouni

2024

J. Phys. B: At. Mol. Opt. Phys.

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We propose a model of two identical autonomous quantum refrigerators that interact through their qubits coupled to cold thermal baths. We consider the same speciﬁc disposition for each refrigerator related to a three-level system coupled to diﬀerent thermal baths and, in turn, to a qubit as the object to be cooled. By coupling the two systems, we show that under certain conditions on the model parameters, the devices can operate in the regime of an independent autonomous quantum refrigerator or be subject to an adjustment of the thermodynamic performances. We further investigate the correlations induced by the interaction between the two refrigerators, and illustrate their behavior with respect to their thermodynamic performances. We have found that adjusting the diﬀerent interaction constants of the model can lead to an evolution of the quantum correlations of the two machines that is inversely related to the behavior of the thermodynamic quantities of both refrigerators. However, this is not necessarily the case when the temperatures of the model are considered as the reference parameters.

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Section: Introductionmentioning

confidence: 99%

On the coupling of three-level quantum refrigerators in the weak coupling limit

Abdou Chakour,

El Allati,

Hassouni

2024

J. Phys. B: At. Mol. Opt. Phys.

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“…Its implications extend to areas such as improved cooling in quantum refrigerators [9], steady-state entanglement generation [10], and autonomous thermal entanglement generation using a common reservoir [11,12]. Moreover, there are many studies exploring the enhancement of entanglement through a quantum absorption refrigerator [13][14][15], shedding light on the coherence phenomenon [16].…”

Section: Introductionmentioning

confidence: 99%

A quantum otto heat engine driven by three quantum dots

Khlifi,

Abaach,

EL Baz

et al. 2024

Phys. Scr.

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A quantum heat engine composed of three coupled quantum dots as the working substance is proposed. Since quantum dots naturally obey the Fermi Hubbard Hamiltonian, the strong coupling interaction regime allows the working substance to be evaluated under an eﬀective Heisenberg Hamiltonian. Indeed, the inﬂuence of the strength coupling, between the three dots, on quantum machine eﬃciency and work in the presence of a homogeneous magnetic ﬁeld is also examined. Furthermore, the inﬂuence of entanglement on the eﬃciency & work of the quantum dot Otto heat engine is well analyzed. As a tripartite working substance, we are interested in analyzing the local work and eﬃciency associated with each single and pair of quantum dots. The results show that the local eﬃciency associated with a pair of quantum dots achieves a maximum value, unlike the global eﬃciency. Indeed, the entanglement impact on Global/local work is studied.

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