Anamalous Frequency Shift in Photoassociation of a Bose-Einstein Condensate

Details Anamalous Frequency Shift in Photoassociation of a Bose-Einstein Condensate Anamalous Frequency Shift in Photoassociation of a Bose-Einstein Condensate

2003-02-07

arxiv.org/abs/physics/0302023v2

Phys. Rev. Lett. 91, 173004 (2003)

Physics

Atomic Physics

v2: 3 pages; more detailed derivation of, defined dominant regime of, and estimated magnitude of anamalous blueshift

Scientific paper

10.1103/PhysRevLett.91.173004

We theoretically investigate the effect of anomalous quantum correlations on the light-induced frequency shift in the photoassociation spectrum of a Bose-Einstein condensate (BEC). Anomalous quantum correlations arise because, although formed from a pair of zero-momentum condensate atoms, a condensate molecule need not dissociate back to the BEC, but may just as well form a noncondensate atom pair with equal and opposite momentum, i.e., due to rogue photodissociation. The uncorrelated frequency shift of the photoassociation spectrum is to the red and linearly dependent on the laser intensity. In contrast, anomalous correlations due to rogue dissociation lead to a blueshifted photoassociation spectrum. For sufficiently low light intensities, the rogue blueshift is dominant and proportional to the squareroot of intensity.

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