Quantum correlations and thermodynamic performances of two-qubit engines with local and common baths

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Abstract

We investigate heat engines whose working substance is made of two coupled qubits performing a generalized Otto cycle by varying their applied magnetic field or their interaction strength during the compression and expansion strokes. During the heating and cooling strokes, the two qubits are coupled to local and common environments that are not necessarily at equilibrium. We find instances of quantum engines coupled to nonequilibrium common environments exhibiting nontrivial connections to quantum correlations as witnessed by a monotonic dependence of the work produced on quantum discord and entanglement.

Original languageEnglish
Article number042102
Pages (from-to)1-11
JournalPhysical Review A
Volume98
Issue number4
DOIs
Publication statusPublished - 02 Oct 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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  • Student Theses

    Quantum Correlations And Thermal Machines

    Author: Hewgill, A., Jul 2020

    Supervisor: De Chiara, G. (Supervisor) & Ferraro, A. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy

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