Monday, July 23, 2012

1207.4961 (Shabnam Safaei et al.)

Raman superradiance and spin lattice of ultracold atoms in optical
cavities
   [PDF]

Shabnam Safaei, Özgur Esat Müstecaplıoğlu, B. Tanatar
We investigate synthesis of a hyperfine spin lattice in an atomic Bose-Einstein condensate, with two hyperfine spin components, inside a one-dimensional driven high-finesse optical cavity, using off-resonant superradiant Raman scattering. Spatio-temporal evolution of the relative population of the hyperfine spin modes is examined by numerically solving the coupled cavity-condensate mean field equations in the dispersive regime. We find that beyond a certain threshold, depending on the transverse and parallel laser pumps and the atom-atom interactions, Raman superradiance and a self-organization of the hyperfine spin components simultaneously occur. Furthermore, the spin lattice can be made robust by ramping up the pump intensity in time then turning it off after a critical value.
View original: http://arxiv.org/abs/1207.4961

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