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Thermodynamics of Quantum Spin-Bath Depolarization
Durga Bhaktavatsala Rao Dasari1
13. Physikalisches Institut, University of Stuttgart, 70569 Stuttgart, Germany.
Entropy (Basel, Switzerland)
|February 25, 2023
Summary
Quantum spin baths can be depolarized by a quantum probe, with induced correlations preventing maximal entropy increase. Energy extraction is possible, and removing correlations boosts energy and entropy rates for quantum battery research.
Area of Science:
- Quantum thermodynamics
- Condensed matter physics
- Quantum information science
Background:
- Quantum spin baths are crucial in quantum systems.
- Understanding energy and entropy dynamics is key for quantum technologies.
- Depolarizing processes affect quantum correlations and thermodynamics.
Purpose of the Study:
- To analyze thermodynamical effects during quantum spin bath depolarization.
- To investigate the role of quantum correlations in energy and entropy changes.
- To explore potential applications in quantum battery research.
Main Methods:
- Exact calculations of heat and entropy changes.
- Utilizing a solvable central spin model with a spin-1/2 system coupled to a spin bath.
- Analyzing the impact of correlations on thermodynamic quantities.
Main Results:
- Induced correlations limit the bath's entropy increase towards its maximum.
- Deposited energy can be fully extracted within a finite time.
- Destroying correlations enhances both energy extraction and entropy rates.
Conclusions:
- Quantum correlations significantly influence thermodynamic processes in depolarizing spin baths.
- The findings offer insights into optimizing energy transfer and storage in quantum systems.
- This research is relevant for advancing quantum battery performance and design.
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