Soliton creation during a Bose-Einstein condensation (2009)
Damski, Bogdan, Zurek, Wojciech H.
We study soliton creation during a non-equilibrium second order phase transition. We investigate a stochastic Gross-Pitaevskii equation that simulates many aspects of the normal gas -- Bose-Einstein...
Damski, Bogdan, Zurek, Wojciech H.
We discuss the dynamics of a quantum phase transition in a spin-1 Bose-Einstein condensate when it is driven from the magnetized broken-symmetry phase to the unmagnetized ``symmetric'' polar phase....
SUPERSYMMETRY AND BOGOMOL'NYI EQUATIONS IN THE MAXWELL CHERN-SIMONS SYSTEMS (2007)
We take advantage of the superspace formalism and explicitly nd the N = 2 supersymmetric extension of the Maxwell ChernSimons model. In our construction a special form of a potential term and...
Dynamics of a quantum phase transition in a ferromagnetic Bose-Einstein condensate (2007)
Damski, Bogdan, Zurek, Wojciech H.
We discuss dynamics of a slow quantum phase transition in a spin-1 Bose-Einstein condensate. We determine analytically the scaling properties of the system magnetization and verify them with...
Mott insulator states of ultracold atoms in optical resonators (2006)
Larson, Jonas, Damski, Bogdan, Morigi, Giovanna, Lewenstein, Maciej
We study the low temperature physics of an ultracold atomic gas in the potential formed inside a pumped optical resonator. Here, the height of the cavity potential, and hence the quantum state of the...
Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond (2006)
Lewenstein, Maciej, Sanpera, Anna, Ahufinger, Veronica, Damski, Bogdan, De, Aditi Sen, Sen, Ujjwal
We review recent developments in the physics of ultracold atomic and molecular gases in optical lattices. Such systems are nearly perfect realisations of various kinds of Hubbard models, and as such...
Damski, Bogdan, Zakrzewski, Jakub
The one dimensional Bose-Hubbard model at a unit filling factor is studied by means of a very high order symbolic perturbative expansion. Analytical expressions are derived for the ground state...
Dynamics of the Bose-Hubbard model: transition from Mott insulator to superfluid (2006)
Cucchietti, Fernando M., Damski, Bogdan, Dziarmaga, Jacek, Zurek, Wojciech H.
We study the dynamics of phase transitions in the one dimensional Bose-Hubbard model. To drive the system from Mott insulator to superfluid phase, we change the tunneling frequency at a finite rate....
Damski, Bogdan, Zurek, Wojciech H.
We show that a simple approximation based on concepts underlying the Kibble-Zurek theory of second order phase transition dynamics can be used to treat avoided level crossing problems. The approach...
Shock waves in a one-dimensional Bose gas: from a Bose-Einstein condensate to a Tonks gas (2005)
We derive and analyze shock-wave solutions of hydrodynamic equations describing repulsively interacting one dimensional Bose gas. We also use the number-conserving Bogolubov approach to verify...
It is shown that dynamics of the Landau-Zener model can be accurately described in terms of the Kibble-Zurek theory of the topological defect production in nonequilibrium phase transitions. The...
Formation of shock waves in a Bose-Einstein condensate (2003)
We consider propagation of density wave packets in a Bose-Einstein condensate. We show that the shape of initially broad, laser-induced, density perturbation changes in the course of free time...
Shock waves in ultracold Fermi (Tonks) gases (2003)
It is shown that a broad density perturbation in a Fermi (Tonks) cloud takes a shock wave form in the course of time evolution. A very accurate analytical description of shock formation is provided....
Stirring Bose-Einstein condensate (2002)
Damski, Bogdan, Sacha, Krzysztof, Zakrzewski, Jakub
By shining a tightly focused laser light on the condensate and moving the center of the beam along the spiral line one may stir the condensate and create vortices. It is shown that one can induce...
Changes of the topological charge of vortices (2002)
Damski, Bogdan, Sacha, Krzysztof
We consider changes of the topological charge of vortices in quantum mechanics by investigating analytical examples where the creation or annihilation of vortices occurs. In classical hydrodynamics...
Collective excitation of trapped degenerate Fermi gases (2001)
Damski, Bogdan, Sacha, Krzysztof, Zakrzewski, Jakub
We show that the slow driving of a focused laser beam through the cloud of trapped cold fermions allows for a creation of the collective excitation in the system. The method, proposed originally by...
Simple method for excitation of a Bose-Einstein condensate (2001)
Damski, Bogdan, Karkuszewski, Zbyszek P., Sacha, Krzysztof, Zakrzewski, Jakub
An appropriate, time-dependent modification of the trapping potential may be sufficient to create effectively collective excitations in a cold atom Bose-Einstein condensate. The proposed method is...
Supersymmetry and Bogomol'nyi equations in the Maxwell Chern-Simons systems (2000)
We take advantage of the superspace formalism and explicitly find the N=2 supersymmetric extension of the Maxwell Chern-Simons model. In our construction a special form of a potential term and...