Raman superradiance and spin lattice of ultracold atoms in optical cavities
arXiv:1207.4961 · doi:10.1088/1367-2630/15/8/083037
Abstract
We investigate synthesis of a hyperfine spin lattice in an atomic Bose-Einstein condensate, with two hyperfine spin components, inside a one-dimensional high-finesse optical cavity, using off-resonant superradiant Raman scattering. Spatio-temporal evolution of the relative population of the hyperfine spin modes is examined numerically by solving the coupled cavity-condensate mean field equations in the dispersive regime. We find, analytically and numerically, that beyond a certain threshold of the transverse laser pump, Raman superradiance and self-organization of the hyperfine spin components simultaneously occur and as a result a magnetic lattice is formed. The effects of an extra laser pump parallel to the cavity axis and the time-dependence of the pump strength on the synthesis of a sharper lattice are also addressed.
Accepted for publication in New Journal of Physics. 16 pages and 6 figures
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- Conventional and unconventional Dicke models: Multistabilities and nonequilibrium dynamics
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- Superradiant optomechanical phases of cold atomic gases in optical resonators
- Spin and density self-ordering in dynamic polarization gradients fields
- Collectively induced many-vortices topology via rotatory Dicke quantum phase transition