Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 15: Quanteneffekte: Verschränkung und Dekohärenz 1

Q 15.4: Talk

Monday, March 12, 2012, 17:15–17:30, V7.01

Generation of correlated photon pairs in different frequency ranges — •Mihai Macovei, Fernando Oster, and Christoph H Keitel — Max-Planck Institute for Nuclear Physics, Saupfercheckweg 1, D-69117 Heidelberg

The feasibility to generate entangled photon pairs at variable frequencies is investigated. For this purpose, we consider the interaction of an off-resonant laser field with a two-level system possessing broken inversion symmetry. We show that the system generates non-classical photon pairs exhibiting strong intensity-intensity correlations. The intensity of the applied laser tunes the degree of correlation while the detuning controls the frequency of one of the photons which can be in the THz-domain. Furthermore, we observe the violation of a Cauchy-Schwarz inequality characterizing these photons.