Hyperfine spectra of trapped Bosons in optical lattices

Details Hyperfine spectra of trapped Bosons in optical lattices Hyperfine spectra of trapped Bosons in optical lattices

2007-08-27

arxiv.org/abs/0708.3657v1

Phys. Rev. A 76, 063612 (2007)

Physics

Condensed Matter

Other Condensed Matter

7 pages, 5 figures, revtex4

Scientific paper

10.1103/PhysRevA.76.063612

We calculate the interaction induced inhomogeneous broadening of spectral lines in a trapped Bose gas as a function of the depth of a three-dimensional cubic optical lattice. As observed in recent experiments, we find that the terraced "wedding-cake" structure of Mott plateaus splits the spectrum into a series of discrete peaks. The spectra are extremely sensitive to density corrugations and trap anharmonicities. For example, even when the majority of the cloud is superfluid the spectrum displays discrete peaks.

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