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Correlated bosons in a one-dimensional optical lattice: Effects of the trapping potential and of quasiperiodic disorder | | Uttam Shrestha
; Michele Modugno
; | | Date: |
23 Aug 2010 | | Abstract: | We investigate the effect of the trapping potential on the quantum phases of
strongly correlated ultracold bosons in one-dimensional periodic and
quasiperiodic optical lattices. By means of a decoupling meanfield approach, we
characterize the ground state of the system and its behavior under variation of
the harmonic trapping, as a function of the total number of atoms. For a small
atom number the system shows an incompressible Mott-insulating phase, as the
size of the cloud remains unaffected when the trapping potential is varied.
When the quasiperiodic potential is added the system develops a
metastable-disordered phase which is neither compressible nor Mott insulating.
This state is characteristic of quasidisorder in the presence of a strong
trapping potential. | | Source: | arXiv, 1008.3770 | | Services: | Forum | Review | PDF | Favorites | |
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