367 citations · 5.1k across the 138 of their papers we have counts for
7 papers · 1 filter
Zoo of quantum phases and excitations of cold bosonic atoms in optical lattices
Ofir E. Alon, Alexej I. Streltsov, Lorenz S. Cederbaum
Quantum phases and phase transitions of weakly- to strongly-interacting bosonic atoms in deep to shallow optical lattices are described by a {\it single multi-orbital mean-field ap…
Properties of fragmented repulsive condensates
Alexej I. Streltsov, Lorenz S. Cederbaum
Repulsive Bose-Einstein condensates immersed into a double-well trap potential are studied within the framework of the recently introduced mean-field approach which allows for boso…
Ground state fragmentation of repulsive BEC in double-trap potentials
Alexej I. Streltsov, Lorenz S. Cederbaum, Nimrod Moiseyev
The fragmentation of the ground state of a repulsive condensate immersed into a double-trap potential is found to be a general and critical phenomenon. It takes place for a given n…
On interacting fermions and bosons with definite total momentum
Ofir E. Alon, Alexej I. Streltsov, Lorenz S. Cederbaum
Any {\it exact} eigenstate with a definite momentum of a many-body Hamiltonian can be written as an integral over a {\it symmetry-broken} function . For two particles, we solve…
Tunneling lifetime of trapped condensates
Nimrod Moiseyev, Lorenz S. Cederbaum
Using the complex scaling transformation we calculate the tunneling lifetime of a condensate inside a magnetic/optical trap. We show that by varying the scattering length, the exte…
Continuous configuration-interaction for condensates in a ring
Ofir E. Alon, Alexej I. Streltsov, Kaspar Sakmann +1
A continuous configuration-interaction approach for condensates in a ring is introduced. In its simplest form this approach utilizes for attractive condensates the Gross-Pitaevskii…