Fedichev Petr O, Fischer Uwe R
Leopold-Franzens-Universität Innsbruck, Institut für Theoretische Physik, Technikerstrasse 25, A-6020 Innsbruck, Austria.
Phys Rev Lett. 2003 Dec 12;91(24):240407. doi: 10.1103/PhysRevLett.91.240407. Epub 2003 Dec 11.
We propose an experimental scheme to observe the Gibbons-Hawking effect in the acoustic analog of a (1+1)-dimensional de Sitter universe, produced in an expanding, cigar-shaped Bose-Einstein condensate. It is shown that a two-level system created at the center of the trap, an atomic quantum dot interacting with phonons, observes a thermal Bose distribution at the de Sitter temperature.
