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4 papers · 2 filters
Quantum switching at a mean-field instability of a Bose-Einstein condensate in an optical lattice
V. S. Shchesnovich, V. V. Konotop
It is shown that bifurcations of the mean-field dynamics of a Bose-Einstein condensate can be related with the quantum phase transitions of the original many-body system. As an exa…
Long-living Bloch oscillations of matter waves in optical lattices
M. Salerno, V. V. Konotop, Yu. V. Bludov
It is shown that by properly designing the spatial dependence of the nonlinearity it is possible to induce long-living Bloch oscillations of a localized wavepacket in a periodic po…
Nonlinear tunneling of BEC in an optical lattice: signatures of quantum collapse and revival
V. S. Shchesnovich, V. V. Konotop
Quantum theory of the intraband resonant tunneling of a Bose-Einstein condensate loaded in a twodimensional optical lattice is considered. It is shown that the phenomena of quantum…
Nonlinear intraband tunneling of BEC in a cubic three-dimensional lattice
V. S. Shchesnovich, V. V. Konotop
The intra-band tunneling of a Bose-Einstein condensate between three degenerate high-symmetry X-points of the Brillouin zone of a cubic optical lattice is studied in the quantum re…