Add to ORKGWe study quantum and thermal properties of the Bose-Hubbard model which describes a lattice gas of interacting bosons. By using the formalism of functional integration at one loop (Gaussian level), we determine the equation of state and elementary excitations. In particular, we investigate the Mott-superfluid quantum phase transition showing that the grand canonical potential crucially depends on system parameters
The phase transitions in the Bose-Hubbard model are investigated. A single-particle Green's function...
We report results of quantum Monte Carlo simulations of the Bose-Hubbard model in three dimensions. ...
Abstract: Matsubara Green's functions for interacting bosons are expressed as classical statistical ...
We study a dilute and ultracold Bose gas of interacting atoms by using an effective field theory whi...
The Bose-Hubbard model describes the physics of a system of bosonic ultracold atoms in an optical la...
8 pages, 6 figures; (v2) Two references addedWe present a strong-coupling expansion of the Bose-Hubb...
We use the density-matrix renormalization group method to investigate ground-state and dynamic prope...
We simulate quantum degenerate Bose gases at finite temperatures in a grand canonical ensemble and u...
We develop a projection operator formalism for studying both the zero-temperature equilibrium phase ...
The many-particle problem of strongly interaction bosons in a lattice potential is investigated. Mot...
The phase transitions in the Bose-Fermi-Hubbard model are investigated. The boson Green's function i...
DoctoralWe study the quantum phase transition from the superfluid to the Mott insu- lator in the fra...
In this work we present the modeling of possible interactions among N neutral atoms trapped in an op...
We report results of quantum Monte Carlo simulations of the Bose-Hubbard model in three dimensions. ...
In this thesis we study quantum degenerate Bose gases at finite temperatures in optical and magnetic...
The phase transitions in the Bose-Hubbard model are investigated. A single-particle Green's function...
We report results of quantum Monte Carlo simulations of the Bose-Hubbard model in three dimensions. ...
Abstract: Matsubara Green's functions for interacting bosons are expressed as classical statistical ...
We study a dilute and ultracold Bose gas of interacting atoms by using an effective field theory whi...
The Bose-Hubbard model describes the physics of a system of bosonic ultracold atoms in an optical la...
8 pages, 6 figures; (v2) Two references addedWe present a strong-coupling expansion of the Bose-Hubb...
We use the density-matrix renormalization group method to investigate ground-state and dynamic prope...
We simulate quantum degenerate Bose gases at finite temperatures in a grand canonical ensemble and u...
We develop a projection operator formalism for studying both the zero-temperature equilibrium phase ...
The many-particle problem of strongly interaction bosons in a lattice potential is investigated. Mot...
The phase transitions in the Bose-Fermi-Hubbard model are investigated. The boson Green's function i...
DoctoralWe study the quantum phase transition from the superfluid to the Mott insu- lator in the fra...
In this work we present the modeling of possible interactions among N neutral atoms trapped in an op...
We report results of quantum Monte Carlo simulations of the Bose-Hubbard model in three dimensions. ...
In this thesis we study quantum degenerate Bose gases at finite temperatures in optical and magnetic...
The phase transitions in the Bose-Hubbard model are investigated. A single-particle Green's function...
We report results of quantum Monte Carlo simulations of the Bose-Hubbard model in three dimensions. ...
Abstract: Matsubara Green's functions for interacting bosons are expressed as classical statistical ...