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• W3100644945 endingPage "215301" @default.
• W3100644945 startingPage "215301" @default.
• W3100644945 abstract "The quantum speed limit (QSL) provides a fundamental upper bound on the speed of quantum evolution, but its evaluation in generic open quantum systems still presents a formidable computational challenge. Herein, we introduce a hybrid quantum-classical method for computing QSL times in multi-level open quantum systems. The method is based on a mixed Wigner-Heisenberg representation of the composite quantum dynamics, in which the open subsystem of interest is treated quantum mechanically and the bath is treated in a classical-like fashion. By solving a set of coupled first-order deterministic differential equations for the quantum and classical degrees of freedom, one can compute the QSL time. To demonstrate the utility of the method, we study the unbiased spin-boson model and provide a detailed analysis of the effect of the subsystem-bath coupling strength and bath temperature on the QSL time. In particular, we find a turnover of the QSL time in the strong coupling regime, which is indicative of a speed-up in the quantum evolution. We also apply the method to the Fenna- Matthews-Olson complex model and identify a potential connection between the QSL time and the efficiency of the excitation energy transfer at different temperatures." @default.
• W3100644945 created "2020-11-23" @default.
• W3100644945 creator A5049263535 @default.
• W3100644945 creator A5060232001 @default.
• W3100644945 creator A5069795012 @default.
• W3100644945 date "2019-04-25" @default.
• W3100644945 modified "2023-10-16" @default.
• W3100644945 title "Hybrid quantum-classical simulation of quantum speed limits in open quantum systems" @default.
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