Phys. Rev. A 61, 033611 (2000) [12 pages]1S-2S spectrum of a hydrogen Bose-Einstein condensateReceived 2 August 1999; published 15 February 2000 We calculate the two-photon 1S-2S spectrum of an atomic hydrogen Bose-Einstein condensate in the regime where the cold collision frequency shift dominates the line shape. Wentzel-Kramers-Brillouin and static phase approximations are made to find the intensities for transitions from the condensate to motional eigenstates for 2S atoms. The excited-state wave functions are found using a mean field potential, which includes the effects of collisions with condensate atoms. Results agree well with experimental data. This formalism can be used to find condensate spectra for a wide range of excitation schemes. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.61.033611
DOI:
10.1103/PhysRevA.61.033611
PACS:
03.75.Fi, 32.70.Jz, 05.30.Jp, 34.50.-s
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