Quantum effects in thermal conduction: Nonequilibrium quantum discord and entanglement

Abstract

We study the process of heat transfer through an entangled pair of two-level system, demonstrating the role of quantum correlations in this nonequilibrium process. While quantum correlations generally degrade with increasing the temperature bias, introducing spatial asymmetry leads to an intricate behavior: Connecting the qubits unequally to the reservoirs one finds that quantum correlations persist and increase with the temperature bias when the system is more weakly linked to the hot reservoir. In the reversed case, linking the system more strongly to the hot bath, the opposite, more natural behavior is observed, with quantum correlations being strongly suppressed upon increasing the temperature bias.

References in corpus (11)

• Heat Transport in low-dimensional systems
• Thermal Logic Gates: Computation with phonons
• Quantum thermal transport in nanostructures
• Thermal memory: a storage of phononic information
• Modeling heat transport through completely positive maps
• Quantum discord and geometry for a class of two-qubit states
• Sufficient conditions for thermal rectification in hybrid quantum structures
• Quantum thermal transport from classical molecular dynamics
• Dynamics of nonequilibrium thermal entanglement
• Heat flux operator, current conservation and the formal Fourier's law
• Control of heat transport in quantum spin systems

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