Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 29: Poster Quanteneffekte

Q 29.11: Poster

Tuesday, March 11, 2008, 16:30–19:00, Poster C2

Stationary light in cold gases — •Gor Nikoghosyan and Michael Fleischhauer — Fachbereich Physik, TU Kaiserslautern

One of the challenging problems of practical quantum information processing with photons is to achieve a strong nonlinear coupling between two single-photon pulses. A promising approach for its realizations is based on so-called stationary light in resonant Λ-type media with electromagnetically induced transparency. Here a weak probe pulse is trapped in the medium by a stationary coupling field. Previous theoretical studies considered room-temperature ensemble where atomic motion leads to a rapid dephasing of high-frequency components of the ground-state coherence allowing for a secular approximation. In the present work we study the dynamics of the probe pulse in cold media where this approximation no longer holds. We show that in the case of one-photon resonance forward and backward components of the probe field are decoupled and no stationary light pattern is formed.