52 citations · 133 across the 7 of their papers we have counts for
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Persistent current of atoms in a ring optical lattice
Andrey R. Kolovsky
We consider a small ensemble of Bose atoms in a ring optical lattice with weak disorder. The atoms are assumed to be initially prepared in a superfluid state with non-zero quasimom…
Bloch oscillations of cold atoms in optical lattices
Andrey R. Kolovsky, Hans Jürgen Korsch
This work is devoted to Bloch oscillations (BO) of cold neutral atoms in optical lattices. After a general introduction to the phenomenon of BO and its realization in optical latti…
Quantum Chaos in the Bose-Hubbard model
Andrey R. Kolovsky, Andreas Buchleitner
We present a numerical study of the spectral properties of the 1D Bose-Hubbard model. Unlike the 1D Hubbard model for fermions, this system is found to be non-integrable, and exhib…
"Bloch oscillations" in the Mott-insulator regime
Andrey R. Kolovsky
We study the dynamical response of cold interacting atoms in the Mott insulator phase to a static force. As shown in the experiment by M. Greiner et. al., Nature \textbf{415}, 39 (…
Interaction-induced decoherence of atomic Bloch oscillations
A. Buchleitner, A. R. Kolovsky
We show that the energy spectrum of the Bose-Hubbard model amended by a static field exhibits Wigner-Dyson level statistics. In itself a characteristic signature of quantum chaos,…
A new Bloch period for interacting cold atoms in 1D optical lattices
Andrey R. Kolovsky
The paper studies Bloch oscillations of ultracold atoms in optical lattice in the presence of atom-atom interaction. A new, interaction-induced Bloch period is identified. The anal…