Coherent population trapping in quantized light field

Details Coherent population trapping in quantized light field Coherent population trapping in quantized light field

2005-04-19

arxiv.org/abs/quant-ph/0504140v2

Physics

Quantum Physics

revtex4, twocolumn, 6 pages, including 1 figure

Scientific paper

10.1209/epl/i2005-10277-9

A full quantum treatment of coherent population trapping (CPT) is given for a system of resonantly coupled atoms and electromagnetic field. We develop a regular analytical method of the construction of generalized dark states (GDS). It turns out that GDS do exist for all optical transitions $F_g\to F_e$, including bright transitions $F\to F+1$ and $F''\to F''$ with $F''$ a half-integer, for which the CPT effect is absent in a classical field. We propose an idea to use an optically thick medium with a transition $F''\to F''$ with $F'' \ge 3/2$ a half-integer as a ''quantum filter'', which transmits only a quantum light.

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