BEC in optical lattice
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Diffraction pattern of atoms perturbed by an optical lattice. In this experiment, we suddenly flash on a deep 2D optical lattice right after releasing the atoms in free space. The lattice imprints a variation in the condensate density and wavefunction phase which populates momentum classes at multiples of the "lattice recoil momentum" determined by the wavelength of the light and the mass of the atoms. |