Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 70: Quantum gases: Lattices IV

Q 70.4: Talk

Friday, March 21, 2014, 17:15–17:30, UDL HS2002

Collective Phenomena in an Array of Trapped Atoms Strongly Coupled to a Nanophotonic Waveguide — •Hashem Zoubi — Max-Planck Institute for the Physics of Complex Systems, Dresden, Germany

A lattice of trapped atoms strongly coupled to a one-dimensional nanophotonic waveguide is investigated in exploiting the concept of polariton as the system natural collective eigenstate. We apply a bosonization procedure, which was presented separately by P. W. Anderson and V. M. Agranovich, to transform excitation spin-half operators into interacting bosons, and which shown here to confirm the hard-core boson model. We derive polariton-polariton kinematic interactions and study them by solving the scattering problem. In using the excitation-photon detuning as a control parameter, we examine the regime in which polaritons behave as weakly interacting photons, and propose the system for realizing superfluidity of photons. We implement the kinematic interaction as a mechanism for nonlinear optical processes that provide an observation tool for the system properties, e.g. the interaction strength produces a blue shift in pump-probe experiments.

[1] H. Zoubi, and H. Ritsch, New J. Phys. 12, 103014 (2010).

[2] H. Zoubi, and H. Ritsch, Advances in Atomic, Molecular, and Optical Physics 62, 171, (Eds.: E. Arimondo, P. Berman, C. Lin), (Elsevier, 2013).

[3] H. Zoubi, Europhys. Lett. 100, 24002 (2012).

[4] H. Zoubi, arXiv:1310.6241 (2013).