Open quantum systems decay across time
arXiv:2006.02358 · doi:10.1103/PhysRevLett.126.210401
Abstract
The description of an open quantum system's decay almost always requires several approximations as to remain tractable. Here, we first revisit the meaning, domain and seeming contradictions of a few of the most widely used of such approximations: semi-group Markovianity, linear response theory, Wigner--Weisskopf and rotating-wave approximation. Secondly, we derive an effective time-dependent decay theory and corresponding generalized quantum regression relations for an open quantum system linearly coupled to an environment. This theory covers all timescales, and subsumes the Markovian and linear-response results as limiting cases. Finally, we apply our theory to the phenomenon of quantum friction.
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- Wading through the void: Exploring quantum friction and nonequilibrium fluctuations
- Electromagnetic Viscosity in Complex Structured Environments: From black-body to Quantum Friction
- Quantum Thermodynamic Uncertainty Relations, Generalized Current Fluctuations and Nonequilibrium Fluctuation-Dissipation Inequalities
- Failure of the geometric approach prediction of excess work scaling for open and isolated quantum systems
- Towards a quantum synapse for quantum sensing
- Spectroscopic footprints of quantum friction in nonreciprocal and chiral media