Coherently Opening a High-Q Cavity

Tommaso Tufarelli, Alessandro Ferraro, Alessio Serafini, Sougato Bose, M. S. Kim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
236 Downloads (Pure)


We propose a general framework to effectively `open' a high-Q resonator, that is, to release the quantum state initially prepared in it in the form of a traveling electromagnetic wave. This is achieved by employing a mediating mode that scatters coherently the radiation from the resonator into a one-dimensional continuum of modes such as a waveguide. The same mechanism may be used to `feed' a desired quantum field to an initially empty cavity. Switching between an `open' and `closed' resonator may then be obtained by controlling either the detuning of the scatterer or the amount of time it spends in the resonator. First, we introduce the model in its general form, identifying (i) the traveling mode that optimally retains the full quantum information of the resonator field and (ii) a suitable figure of merit that we study analytically in terms of the system parameters. Then, we discuss two feasible implementations based on ensembles of two-level atoms interacting with cavity fields. In addition, we discuss how to integrate traditional cavity QED in our proposal using three-level atoms.
Original languageEnglish
Article number133605
Number of pages5
JournalPhysical Review Letters
Issue number13
Publication statusPublished - 04 Apr 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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