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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
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Thermodynamics of quantum-jump-conditioned feedback control.
Philipp Strasberg1, Gernot Schaller1, Tobias Brandes1
1Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 4, 2014
Summary
Quantum feedback operations in open quantum systems modify thermodynamic laws. This study explores quantum heat pumps and stabilizing coherences in nonequilibrium states.
Area of Science:
- Quantum Thermodynamics
- Open Quantum Systems
- Quantum Control
Background:
- Open quantum systems interact with thermal reservoirs.
- Quantum feedback operations are crucial for controlling quantum states.
- Understanding thermodynamics in quantum systems is an active research area.
Purpose of the Study:
- To establish a thermodynamic description for open quantum systems under quantum feedback.
- To analyze modifications to the first and second laws of thermodynamics due to feedback.
- To investigate the application of quantum feedback in quantum heat pumps and coherence stabilization.
Main Methods:
- Theoretical framework for open quantum systems with delayed quantum feedback.
- Analysis of thermodynamic quantities (e.g., work, heat) under feedback control.
- Application to a qubit system operating as a heat pump.
Main Results:
- Modified first and second laws of thermodynamics for feedback-controlled quantum systems.
- Demonstration of a qubit heat pump controlled by quantum feedback.
- Stabilization of coherences in nonequilibrium stationary states, potentially leading to pure states.
Conclusions:
- Quantum feedback offers a powerful tool to manipulate thermodynamics in open quantum systems.
- Feedback-controlled quantum heat pumps can achieve specific operational efficiencies.
- Quantum feedback can engineer desired nonequilibrium steady states, including pure states.
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