@misc{10481/70511,
year = {2021},
month = {3},
url = {http://hdl.handle.net/10481/70511},
abstract = {Ergodicity breaking and slow relaxation are intriguing aspects of nonequilibrium dynamics both in
classical and 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 timescales 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 no longer excites 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 speeding-up in the convergence to
stationarity in Dicke models, and how to avoid metastable regimes in an all-to-all interacting spin system.},
organization = {Wissenschaftler-Ruckkehrprogramm GSO/CZS of the Carl-Zeiss-Stiftung},
organization = {German Scholars Organization e.V.},
organization = {German Research Foundation (DFG)	435696605},
organization = {Spanish Ministerio de Ciencia, Innovacion y Universidades},
organization = {Agencia Estatal de Investigacion	MTM2017-84446-C2-2-R	
PID2020-116567GB-C22},
publisher = {American Physical Society},
title = {Exponentially Accelerated Approach to Stationarity in Markovian Open Quantum Systems through the Mpemba Effect},
author = {Carollo, Federico and Lasanta Becerra, Antonio and Lesanovsky, Igor},
}