Matter-wave analog of an optical random laser

Details Matter-wave analog of an optical random laser Matter-wave analog of an optical random laser

2011-03-17

arxiv.org/abs/1103.3424v2

Phys. Rev. A 84, 023624 (2011)

Physics

Condensed Matter

Quantum Gases

4 pages, 3 figures version accepted for publication in Phys. Rev. A; minor changes, the present title substituted for "Atom Ra

Scientific paper

10.1103/PhysRevA.84.023624

The accumulation of atoms in the lowest energy level of a trap and the subsequent out-coupling of these atoms is a realization of a matter-wave analog of a conventional optical laser. Optical random lasers require materials that provide optical gain but, contrary to conventional lasers, the modes are determined by multiple scattering and not a cavity. We show that a Bose-Einstein condensate can be loaded in a spatially correlated disorder potential prepared in such a way that the Anderson localization phenomenon operates as a band-pass filter. A multiple scattering process selects atoms with certain momenta and determines laser modes which represents a matter-wave analog of an optical random laser.

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