What is it about?
This research explores the complex behavior of quantum systems where a central spin is influenced by nearby spins, known as a spin bath. We uncover important thermodynamic properties and implications by analyzing how energy and heat flow within this system. Further, the laws of quantum thermodynamics are benchmarked in a strong coupling scenario. We also investigate how these spins can act as a quantum battery, highlighting exciting possibilities in quantum energy storage and conversion.
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Why is it important?
Correct definitions of heat, work, and entropy production in quantum systems strongly coupled to their environment have been debated. In this regard, several definitions have taken their place in the literature. We provide a test bed to benchmark these definitions by providing an exact reduced dynamics of the system at arbitrary strong system-bath coupling. Our findings reflect that certain definitions of entropy production in the literature should be used carefully; otherwise, they may break the laws of quantum thermodynamics.
Perspectives
We faced a few setbacks while working on this article. However, those challenges were quite valuable, as they deepened our understanding of quantum thermodynamics and its fundamental laws. I enjoyed the conversations I had with my co-authors; they brought new energy and perspectives to our work. The topic of strong coupling quantum thermodynamics has the potential to engage a broader audience in quantum physics, and I’m thrilled that we were able to contribute to its understanding.
Mr. Devvrat Tiwari
Indian Institute of Technology Jodhpur
Read the Original
This page is a summary of: Strong coupling non-Markovian quantum thermodynamics of a finite-bath system, The Journal of Chemical Physics, March 2025, American Institute of Physics,
DOI: 10.1063/5.0254029.
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