Energy exchange and fluctuations between a dissipative qubit and a monitor under continuous measurement and feedback
arXiv:2409.09452 · doi:10.21468/SciPostPhysCore.8.1.016
Abstract
Continuous quantum measurement and feedback induce energy exchange between a dissipative qubit and a monitor even in the steady state, as a measurement backaction. Using the Lindblad equation, we identified the maximum and minimum values of the steady-state energy flow as the measurement and feedback states vary, and we demonstrate the qubit cooling induced by these processes. Turning our attention to quantum trajectories under continuous measurement and feedback, we observe that the energy flow fluctuates around the steady-state values. We reveal that the fluctuations are strongly influenced by the measurement backaction, distinguishing them from the standard Poisson noise typically observed in electronic circuits. Our results offer potential application in the development of quantum refrigerators controlled by continuous measurement and feedback, and provide deep insight into quantum thermodynamics from the perspective of fluctuation.
17 pages, 7 figures
References in corpus (16)
- Experimental study of mutual information in a Maxwell Demon
- The role of quantum measurement in stochastic thermodynamics
- Colloquium: Quantum heat transport in condensed matter systems
- Thermodynamic uncertainty relation for general open quantum systems
- Two-electron bunching in transport through a QD induced by Kondo correlations
- Evolution of the Kondo Effect in a Quantum Dot Probed by the Shot Noise
- Efficiently Fuelling a Quantum Engine with Incompatible Measurements
- Extending the laws of thermodynamics for arbitrary autonomous quantum systems
- Exact description of transport and non-reciprocity in monitored quantum devices
- Quantum Fluctuation Theorem under Continuous Measurement and Feedback
- Measurement-based quantum thermal machines with feedback control
- Post-selection and quantum energetics
- Quantum Ergotropy and Quantum Feedback Control
- Heat transport through a two-level system under continuous quantum measurement
- Heat flow from a measurement apparatus monitoring a dissipative qubit
- Energy exchange and fluctuations between a dissipative qubit and a monitor under continuous measurement and feedback