Physics – Quantum Physics
Scientific paper
2003-12-15
Phys. Rev. A 70, 013414 (2004)
Physics
Quantum Physics
10 pages, 9 figures, accepted for publication in Phys. Rev. A. Minor grammatical changes to previous version
Scientific paper
10.1103/PhysRevA.70.013414
We study the motion of two atoms trapped at distant positions in the field of a driven standing wave high-Q optical resonator. Even without any direct atom-atom interaction the atoms are coupled through their position dependent influence on the intracavity field. For sufficiently good trapping and low cavity losses the atomic motion becomes significantly correlated and the two particles oscillate in their wells preferentially with a 90 degrees relative phase shift. The onset of correlations seriously limits cavity cooling efficiency, raising the achievable temperature to the Doppler limit. The physical origin of the correlation can be traced back to a cavity mediated cross-friction, i.e. a friction force on one particle depending on the velocity of the second particle. Choosing appropriate operating conditions allows for engineering these long range correlations. In addition this cross-friction effect can provide a basis for sympathetic cooling of distant trapped clouds.
Asboth J. K.
Domokos Peter
Ritsch Helmut
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