Phase-dependent light propagation in atomic vapors

Details Phase-dependent light propagation in atomic vapors Phase-dependent light propagation in atomic vapors

2006-05-22

arxiv.org/abs/physics/0605176v3

Phys. Rev. A 75, 013816 (2007).

Physics

Atomic Physics

16 pages, 11 figures, v2: typos corrected, v3: final version, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.75.013816

Light propagation in an atomic medium whose coupled electronic levels form a diamond-configuration exhibits a critical dependence on the input conditions. In particular, the relative phase of the input fields gives rise to interference phenomena in the electronic excitation whose interplay with relaxation processes determines the stationary state. We integrate numerically the Maxwell-Bloch equations and observe two metastable behaviors for the relative phase of the propagating fields corresponding to two possible interference phenomena. These phenomena are associated to separate types of response along propagation, minimize dissipation, and are due to atomic coherence. These behaviors could be studied in gases of isotopes of alkali-earth atoms with zero nuclear spin, and offer new perspectives in control techniques in quantum electronics.

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