Highly non-Gaussian states created via cross-Kerr nonlinearity

Details Highly non-Gaussian states created via cross-Kerr nonlinearity Highly non-Gaussian states created via cross-Kerr nonlinearity

2007-09-13

arxiv.org/abs/0709.2011v1

New J. Phys. 10, 023041 (2008)

Physics

Quantum Physics

12 pages, 7 figures

Scientific paper

10.1088/1367-2630/10/2/023041

We propose a feasible scheme for generation of strongly non-Gaussian states using the cross-Kerr nonlinearity. The resultant states are highly non-classical states of electromagnetic field and exhibit negativity of their Wigner function, sub-Poissonian photon statistics, and amplitude squeezing. Furthermore, the Wigner function has a distinctly pronounced ``banana'' or ``crescent'' shape specific for the Kerr-type interactions, which so far was not demonstrated experimentally. We show that creating and detecting such states should be possible with the present technology using electromagnetically induced transparency in a four-level atomic system in N-configuration.

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