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Dynamical properties of ultracold bosons in an optical lattice
S. D. Huber, E. Altman, H. P. Büchler +1
We study the excitation spectrum of strongly correlated lattice bosons for the Mott-insulating phase and for the superfluid phase close to localization. Within a Schwinger-boson me…
Intrinsic dephasing in one dimensional ultracold atom interferometers
Rafi Bistritzer, Ehud Altman
Quantum phase fluctuations play a crucial role in low dimensional systems. In particular they prevent true long range phase order from forming in one dimensional condensates, even…
Hidden order in 1D Bose insulators
Emanuele G. Dalla Torre, Erez Berg, Ehud Altman
We investigate the phase diagram of spinless bosons with long range (~ 1/r^3) repulsive interactions, relevant to ultracold polarized atoms or molecules, using DMRG. Between the tw…
Quench dynamics and non equilibrium phase diagram of the Bose-Hubbard model
Corinna Kollath, Andreas Laeuchli, Ehud Altman
We investigate the time evolution of correlations in the Bose-Hubbard model following a quench from the superfluid to the Mott insulating phase. For large values of the final inter…