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7 papers · 2 filters
Thermalization of strongly interacting bosons after spontaneous emissions in optical lattices
Johannes Schachenmayer, Lode Pollet, Matthias Troyer +1
We study the out-of-equilibrium dynamics of bosonic atoms in a 1D optical lattice, after the ground-state is excited by a single spontaneous emission event, i.e. after an absorptio…
Pairing in a system of a few attractive fermions in a harmonic trap
Tomasz Sowiński, Mariusz Gajda, Kazimierz Rzążewski
We study a strongly attractive system of a few spin-1/2 fermions confined in a one-dimensional harmonic trap, interacting via two-body contact potential. Performing exact diagonali…
Non-standard Hubbard models in optical lattices: a review
Omjyoti Dutta, Mariusz Gajda, Philipp Hauke +5
Originally, the Hubbard model has been derived for describing the behaviour of strongly-correlated electrons in solids. However, since over a decade now, variations of it are also…
Mean-field approaches to the Bose-Hubbard model with three-body local interaction
Tomasz Sowiński, Ravindra W. Chhajlany
The zero temperature properties of the generalized Bose-Hubbard model including three-body interactions are studied on a mean-field level. We obtain analytical results using the so…
Correspondence between dark solitons and the type II excitations of Lieb-Liniger model
T. Karpiuk, T. Sowinski, M. Gajda +2
A one-dimensional model of bosons with repulsive short-range interactions, solved analytically by Lieb and Liniger many years ago, predicts existence of two branches of elementary…
Classical fields and quantum measurement for Bose-Einstein condensate
Tomasz Górski, Kazimierz Rzążewski
We analyze a process of splitting of the Bose-Einstein condensate and the mutual coherence of two separated atomic clouds. Within the classical fields approximation we show that co…