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- W3186013846 abstract "Ergodicity-breaking and slow relaxation are intriguing aspects of nonequilibrium dynamics both in classical and in quantum settings. These phenomena are typically associated with phase transitions, e.g. the emergence of metastable regimes near a first-order transition or scaling dynamics in the vicinity of critical points. Despite being of fundamental interest the associated divergent time scales are a hindrance when trying to explore steady-state properties. Here we show that the relaxation dynamics of Markovian open quantum systems can be accelerated exponentially by devising an optimal unitary transformation that is applied to the quantum system immediately before the actual dynamics. This initial rotation is engineered in such a way that the state of the quantum system becomes orthogonal to the slowest decaying dynamical mode. We illustrate our idea -- which is inspired by the so-called Mpemba effect, i.e., water freezing faster when initially heated up -- by showing how to achieve an exponential speed-up in the convergence to stationarity in Dicke models, and how to avoid metastable regimes in an all-to-all interacting spin system." @default.
- W3186013846 created "2021-08-02" @default.
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- W3186013846 date "2021-08-02" @default.
- W3186013846 modified "2023-10-17" @default.
- W3186013846 title "Exponentially Accelerated Approach to Stationarity in Markovian Open Quantum Systems through the Mpemba Effect" @default.
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- W3186013846 doi "https://doi.org/10.1103/physrevlett.127.060401" @default.
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- W3186013846 hasPublicationYear "2021" @default.
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