Adiabaticity when raising a uniform 3D optical lattice in a bimodal Bose-Einstein condensate
arXiv:1804.06147 · doi:10.1103/PhysRevA.98.023621
Abstract
Using the time-dependent Bogoliubov approach, we study adiabaticity for a two-component Bose-Einstein condensate in a 3D time-dependent optical lattice with unit filling, in the superfluid and weakly interacting regime. We show that raising the lattice potential height can couple the ground state of the Bogoliubov Hamiltonian to excited states with two quasiparticles of opposite quasi-momenta. In the symmetric case for interactions and density in the two components these represent sound waves where the two components oscillate out of phase. We find an analytic expression of the adiabatic time, its dependence on the fraction of atoms in each component and its scaling with the system size.
arXiv comment11 pages, 2 figures
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- Producing and storing spin-squeezed states and Greenberger-Horne-Zeilinger states in a one-dimensional optical lattice
- One-axis twisting as a method of generating many-body Bell correlations
- Bounds on detection of Bell correlations with entangled ultra-cold atoms in optical lattices under occupation defects