Group Velocity of a Probe Light in an Ensemble of Lambda Atoms under Two-Photon Resonance

Abstract

We study the propagation of a probe light in an ensemble of $\Lambda$-type atoms, utilizing the dynamic symmetry as recently discovered when the atoms are coupled to a classical control field and a quantum probe field {[Sun {\it et al.,} Phys. Rev. Lett. {\bf 91}, 147903 (2003)]}. Under two-photon resonance, we calculate the group velocity of the probe light with collective atomic excitations. Our result gives the dependence of the group velocity on the common one-photon detuning, and can be compared with the recent experiment (E. E. Mikhailov, Y. V. Rostovtsev, and G. R. Welch, quant-ph/0309173).

4 pages, 3 figures

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• Coupled cavity QED for coherent control of photon transmission (I): Green function approach for hybrid systems with two-level doping
• Quantum Optomechanics with Single Atom
• Correlated Photons from Collective Excitations of Three-Level Atomic Ensemble
• Analog of Electromagnetically Induced Transparency Effect for Two Nano/Micro-mechanical Resonators Coupled With Spin Ensemble
• Metamaterials Mimicking Dynamic Spacetime, D-brane and Noncommutativity in String Theory
• Zeno-anti-Zeno crossover via external fields in a one-dimensional coupled-cavity waveguide
• Quantum Memory Based on $\Lambda$-Atoms Ensemble with Two-Photon Resonance EIT
• Propagation of Light in an Ensemble of "3+1"-Level Atoms