Berlin 2001 – scientific programme
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Q: Quantenoptik
Q 22: Poster: Quantum Effects
Q 22.1: Poster
Thursday, April 5, 2001, 12:30–15:00, AT2
Nonclassical interference from coherently driven 2-level atoms — •Christoph Skornia1,2, Joachim von Zanthier1, Girish S. Agarwal1,3, Ersnt Werner2, and Herbert Walther1 — 1Max-Planck-Institut für Quantenoptik and Sektion Physik der LMU München, D-85748 Garching, Germany — 2Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany — 3Physical Research Laboratory, Navrangpura, Ahmedabad-380 009, India
We show analytically the existence of nonclassical correlations in the radiation of two 2-level atoms which are coherently driven by a continuous laser source [1]. The 2 photon correlation function of the fluorescence light exhibits a spatial interference pattern which is not present in classical radiation. An aspect of the phenomenon is that bunched and antibunched light is emitted in different spatial directions. The observed features change with the distance of the atoms. The correlations are induced by a state reduction due to the measurement process when the detection of the photons does not distinguish between the individual atoms. It is interesting to note that the observed phenomena show up even without the assumption of interatomic interaction.
[1] C. Skornia, J. von Zanthier, G. S. Agarwal, E. Werner, H. Walther, submitted to Phys. Rev. Lett.