Coherence Properties of a Bose-Einstein Condensate in an Optical Superlattice
arXiv:0705.2319 · doi:10.1140/epjd/e2007-00309-0
Abstract
We study the effect of a one dimensional optical superlattice on the superfluid fraction, number squeezing, dynamic structure factor and the quasi-momentum distribution of the Mott-insulator. We show that due to the secondary lattice,there is a decrease in the superfluid fraction and the number fluctuation. The dynamic structure factor which can be measured by Bragg spectroscopy is also suppressed due to the addition of the secondary lattice. The visibility of the interference pattern (the quasi-momentum distribution)of the Mott-insulator is found to decrease due to the presence of the secondary lattice. Our results have important implications in atom interferometry and quantum computation in optical lattices.
arXiv comment12 pages, 5 figures
References in corpus (20)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Collapse and Revival of the Matter Wave Field of a Bose-Einstein Condensate
- Transition from a strongly interacting 1D superfluid to a Mott insulator
- Bloch oscillations and mean-field effects of Bose-Einstein condensates in 1-D optical lattices
- Quantum phases in an optical lattice
- A lattice of double wells for manipulating pairs of cold atoms
- Interference of an array of independent Bose-Einstein condensates
- Phase Diagram of Bosonic Atoms in Two-Color Superlattices
- Interference pattern and visibility of a Mott insulator
- Defect-Suppressed Atomic Crystals in an Optical Lattice
- Bogoliubov approach to superfluidity of atoms in an optical lattice
- Nonequilibrium Dynamics of Optical Lattice-Loaded BEC Atoms: Beyond HFB Approximation
- Phase Diagram for Ultracold Bosons in Optical Lattices and Superlattices
- Exact Study of the 1D Boson Hubbard Model with a Superlattice Potential
- Extended Coherence Time with Atom-Number Squeezed Sources
- Dynamic structure factor of a Bose Einstein condensate in a 1D optical lattice
- Manipulation of matter waves using Bloch and Bloch-Zener oscillations
- Dispersion control for matter waves and gap solitons in optical superlattices
- Oscillations of Bose condensates in a one-dimensional optical superlattice
- Superfluid Dynamics of a Bose-Einstein Condensate in a One Dimensional Optical Super-Lattice