578 citations · 1.9k across the 15 of their papers we have counts for
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Relaxation of antiferromagnetic order in spin-1/2 chains following a quantum quench
Peter Barmettler, Matthias Punk, Vladimir Gritsev +2
We study the unitary time evolution of antiferromagnetic order in anisotropic Heisenberg chains that are initially prepared in a pure quantum state far from equilibrium. Our analys…
The Amplitude Mode in the Quantum Phase Model
S. D. Huber, B. Theiler, E. Altman +1
We derive the collective low energy excitations of the quantum phase model of interacting lattice bosons within the superfluid state using a dynamical variational approach. We reco…
How to study correlation functions in fluctuating Bose liquids using interference experiments
Vladimir Gritsev, Ehud Altman, Anatoli Polkovnikov +1
Interference experiments with independent condensates provide a powerful tool for analyzing correlation functions. Scaling of the average fringe contrast with the system size is de…
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…