Information dynamics in cavity QED

Details Information dynamics in cavity QED Information dynamics in cavity QED

2002-10-03

arxiv.org/abs/quant-ph/0210024v3

Phys. Rev. A 67, 033804 (2003)

Physics

Quantum Physics

11 pages, 1 figure, final version

Scientific paper

10.1103/PhysRevA.67.033804

A common experimental setup in cavity quantum electrodynamics (QED) consists of a single two-level atom interacting with a single mode of the electromagnetic field inside an optical cavity. The cavity is externally driven and the output is continuously monitored via homodyne measurements. We derive formulas for the optimal rates at which these measurements provide information about (i) the quantum state of the system composed of atom and electromagnetic field, and (ii) the coupling strength between atom and field. We find that the two information rates are anticorrelated.

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