Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 1: Quantum Effects: Light Scattering and Propagation I / Interference and Correlations I

Q 1.1: Vortrag

Montag, 8. März 2010, 14:00–14:15, A 310

Propagation of quantum fluctuations in EIT media — •Marc Bienert¹ and Pablo Barberis-Blostein² — ¹Theoretische Physik, Universität des Saarlandes, 66041 Saarbrücken — ²Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas, Universidad Nacional Autónoma de México, 04510 México D.F., Mexico

We analyze the propagation of a pair of quantized fields inside a medium of three-level atoms in a Lambda configuration. We calculate the stationary quadrature noise spectrum of the field, in the case where the probe field is in a squeezed state and the atoms show electromagnetically induced transparency. We find an oscillatory transfer of the initial quantum properties between the probe and pump fields which is most strongly pronounced when both fields have comparable intensities. This implies that the quantum state measured after propagation can be completely different from the initial state, even though the mean values of the field are unaltered. We furthermore address the case where the two fields drive the Lambda system in two-photon resonance but detuned from the excited state and discuss the influence of the Doppler width on the propagation.