Volume 72, Number 4, November 2005
|Page(s)||562 - 568|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||14 October 2005|
Coherent population trapping in quantized light field
Novosibirsk State University - Pirogova 2, Novosibirsk 630090, Russia and Institute of Laser Physics, SB RAS - Lavrentyeva 13/3, Novosibirsk 630090, Russia
Accepted: 21 September 2005
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 , including bright transitions and 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 with a half-integer as a “quantum filter”, which transmits only a quantum light with limited number of photons. Such a quantum filter can be used as a deterministic source of Fock's state of light.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 03.67.-a – Quantum information
© EDP Sciences, 2005
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