Limits to the analogue Hawking temperature in a Bose-Einstein condensate

Details Limits to the analogue Hawking temperature in a Bose-Einstein condensate Limits to the analogue Hawking temperature in a Bose-Einstein condensate

2007-02-02

arxiv.org/abs/cond-mat/0702045v2

Phys. Rev. A 76 (2007) 013608

Physics

Condensed Matter

Other Condensed Matter

9 pages, 4 figures, replaced with published version

Scientific paper

10.1103/PhysRevA.76.013608

Quasi-one dimensional outflow from a dilute gas Bose-Einstein condensate reservoir is a promising system for the creation of analogue Hawking radiation. We use numerical modeling to show that stable sonic horizons exist in such a system under realistic conditions, taking into account the transverse dimensions and three-body loss. We find that loss limits the analogue Hawking temperatures achievable in the hydrodynamic regime, with sodium condensates allowing the highest temperatures. A condensate of 30,000 atoms, with transverse confinement frequency omega_perp=6800*2*pi Hz, yields horizon temperatures of about 20 nK over a period of 50 ms. This is at least four times higher than for other atoms commonly used for Bose-Einstein condensates.

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