Experimental signature of initial quantum coherence on entropy production
arXiv:2208.01782 · doi:10.1038/s41534-023-00738-0
Abstract
We report the experimental quantification of the contribution to non-equilibrium entropy production that stems from the quantum coherence content in the initial state of a qubit exposed to both coherent driving and dissipation. Our experimental demonstration builds on the exquisite experimental control of the spin state of a nitrogen-vacancy defect in diamond and is underpinned, theoretically, by the formulation of a generalized fluctuation theorem designed to track the effects of quantum coherence. Our results provide significant evidence of the possibility to pinpoint the genuinely quantum mechanical contributions to the thermodynamics of non-equilibrium quantum processes.
5+5 pages, 4+2 figures, RevTeX4-2
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- Quasiprobabilities in quantum thermodynamics and many-body systems
- Projective measurements can probe non-classical work extraction and time-correlations
- Roadmap on Quantum Thermodynamics
- Diagnostics of quantum-gate coherences via end-point-measurement statistics
- Universal defects statistics with strong long-range interactions
- Observation of partial and infinite-temperature thermalization induced by repeated measurements on a quantum hardware
- Experimental demonstration of generalized quantum fluctuation theorems in the presence of coherence
- Evidence of genuine quantum effects in nonequilibrium entropy production
- Coherent heat exchange in a prethermalizing open quantum system
- Squeezing generation crossing a mean-field critical point: Work statistics, irreversibility and critical fingerprints
- Energy exchange statistics and fluctuation theorem for non-thermal asymptotic states
- Orthogonalization speed-up from quantum coherence after a sudden quench
- Thermodynamic Signature of Logical Depth in Quantum Circuits