| Issue |
Europhys. Lett.
Volume 72, Number 4, November 2005
|
|
|---|---|---|
| Page(s) | 562 - 568 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2005-10277-9 | |
| 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
Received:
6
June
2005
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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