Steady-state entanglement production in a quantum thermal machine with continuous feedback control
arXiv:2309.07696 · doi:10.1088/1367-2630/ad3f3d
Abstract
Quantum thermal machines can generate steady-state entanglement by harvesting spontaneous interactions with local environments. However, using minimal resources and control, the entanglement is typically very noisy. Here, we study entanglement generation in a two-qubit quantum thermal machine in the presence of a continuous feedback protocol. Each qubit is measured continuously and the outcomes are used for real-time feedback to control the local system-environment interactions. We show that there exists an ideal operation regime where the quality of entanglement is significantly improved, to the extent that it can violate standard Bell inequalities and uphold quantum teleportation. In particular, we find, for ideal operation, that the heat current across the system is proportional to the entanglement concurrence. Finally, we investigate the robustness of entanglement production when the machine operates away from the ideal conditions.
arXiv comment9 pages, 5 figures
References in corpus (20)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Quantum heat engines and refrigerators: Continuous devices
- Quantum thermal absorption machines: refrigerators, engines and clocks
- Stabilising entanglement by quantum jump-based feedback
- Controlling entanglement by direct quantum feedback
- Dynamical creation of entanglement by homodyne-mediated feedback
- Autonomous quantum thermal machine for generating steady-state entanglement
- Towards feedback control of entanglement
- Entanglement and thermokinetic uncertainty relations in coherent mesoscopic transport
- Universal control of a bosonic mode via drive-activated native cubic interactions
- Autonomous multipartite entanglement engines
- Critical heat current for operating an entanglement engine
- Suppressing decoherence and improving entanglement by quantum-jump-based feedback control in two-level systems
- Experimental verification of the work fluctuation-dissipation relation for information-to-work conversion
- Heralded generation of maximal entanglement in any dimension via incoherent coupling to thermal baths
- Quantum Fokker-Planck Master Equation for Continuous Feedback Control
- Individually addressable double quantum dots formed with nanowire polytypes and identified by epitaxial markers
- Improving autonomous thermal entanglement generation using a common reservoir
- Operational nonclassicality in minimal autonomous thermal machines
- On-demand maximally entangled states with a parity meter and continuous feedback
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