Full observation of single-atom dynamics in cavity QED

Details Full observation of single-atom dynamics in cavity QED Full observation of single-atom dynamics in cavity QED

1998-05-25

arxiv.org/abs/quant-ph/9805076v1

Physics

Quantum Physics

Submitted to Applied Physics B. Uses Revtex, 13 pages with 11 EPS figures

Scientific paper

10.1007/s003400050751

We report the use of broadband heterodyne spectroscopy to perform continuous measurement of the interaction energy between one atom and a high-finesse optical cavity, during individual transit events of $\sim 250$ $\mu$s duration. Measurements over a wide range of atom-cavity detunings reveal the transition from resonant to dispersive coupling, via the transfer of atom-induced signals from the amplitude to the phase of light transmitted through the cavity. By suppressing all sources of excess technical noise, we approach a measurement regime in which the broadband photocurrent may be interpreted as a classical record of conditional quantum evolution in the sense of recently developed quantum trajectory theories.

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