Environment-Assisted Speed-up of the Field Evolution in Cavity Quantum Electrodynamics

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Citation of Original Publication

A. D. Cimmarusti et al, Environment-Assisted Speed-up of the Field Evolution in Cavity Quantum Electrodynamics, Phys. Rev. Lett. 114(23) (2015), DOI:https://doi.org/10.1103/PhysRevLett.114.233602


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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law



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 repopulation in the optical cavity increases with the coupling strength between the optical cavity mode and this non-Markovian environment (the number of atoms).