Environment assisted speed-up of the field evolution in cavity QED

Abstract

We measure the quantum speed of the state evolution of the field in a weakly-driven optical cavity QED system. To this end, the mode of the electromagnetic field is considered as a quantum system of interest with a preferential coupling to a tunable environment: the atoms. By controlling the environment, i.e., changing the number of atoms coupled to the optical cavity mode, an environment assisted speed-up is realized: the quantum speed of the state re-population in the optical cavity increases with the coupling strength between the optical cavity mode and this non-Markovian environment (the number of atoms).

5 pages, 5 figures

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• Quantum speed limit for physical processes
• Quantum speed limits in open system dynamics
• Generalized Clausius inequality for nonequilibrium quantum processes
• Observation of non-Markovian dynamics of a single quantum dot in a micropillar cavity
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