Controlled generation of momentum states in a high-finesse ring cavity

Details Controlled generation of momentum states in a high-finesse ring cavity Controlled generation of momentum states in a high-finesse ring cavity

2011-11-12

arxiv.org/abs/1111.2906v2

Physics

Condensed Matter

Quantum Gases

Submitted to EPJ-ST Special Issue. 10 pages and 3 figures

Scientific paper

A Bose-Einstein condensate in a high-finesse ring cavity scatters the photons of a pump beam into counterpropagating cavity modes, populating a bi-dimensional momentum lattice. A high-finesse ring cavity with a sub-recoil linewidth allows to control the quantized atomic motion, selecting particular discrete momentum states and generating atom-photon entanglement. The semiclassical and quantum model for the 2D collective atomic recoil lasing (CARL) are derived and the superradiant and good-cavity regimes discussed. For pump incidence perpendicular to the cavity axis, the momentum lattice is symmetrically populated. Conversely, for oblique pump incidence the motion along the two recoil directions is unbalanced and different momentum states can be populated on demand by tuning the pump frequency.

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