Susceptibility and Group Velocity in a Fully Quantized Model For Electromagnetically Induced Transparency

Details Susceptibility and Group Velocity in a Fully Quantized Model For Electromagnetically Induced Transparency Susceptibility and Group Velocity in a Fully Quantized Model For Electromagnetically Induced Transparency

2003-06-27

arxiv.org/abs/quant-ph/0306186v1

Physics

Quantum Physics

10 pages, 3 figures, Submitted to Phys.Lett.A

Scientific paper

We have developed a fully quantized model for EIT in which the decay rates are taken into account. In this model, the general form of the susceptibility and group velocity of the probe laser we obtained are operators. Their expectation value and fluctuation can be obtained on the Fock space. Furthermore the uncertainty of the group velocity under very weak intensity of the controlling laser and the uncertainty relation between the phase operator of coupling laser and the group velocity are approximately given. Considering the decay rates of various levels, we may analyze the probe laser near resonance in detail and calculate the fluctuation in both absorption and dispersion. We also discuss how the fully quantized model reduces to a semiclassical model when the mean photon numbers of the coupling laser is getting large.

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