651 citations
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9 papers · 1 filter
Bose statistics and classical fields
Emilia Witkowska, Mariusz Gajda, Kazimierz Rzążewski
Classical fields counterpart of the ideal Bose gas statistics in a trap is investigated by performing calculations in the canonical ensemble. There exists the optimal cut-off which…
Decay of multiply charged vortices at nonzero temperatures
Tomasz Karpiuk, Miroslaw Brewczyk, Mariusz Gajda +1
We study the instability of multiply charged vortices in the presence of thermal atoms and find various scenarios of splitting of such vortices. The onset of the decay of a vortex…
Splitting of doubly quantized vortices in dilute Bose-Einstein condensates
K. Gawryluk, T. Karpiuk, M. Brewczyk +1
We investigate the dynamics of doubly charged vortices generated in dilute Bose-Einstein condensates by using the topological phase imprinting technique. We find splitting times of…
Macroscopic superposition states in rotating ring lattices
Andreas Nunnenkamp, Ana Maria Rey
We investigate the effects of rotation on one-dimensional ultracold bosons confined to optical ring lattices. First, we show that there exists a critical rotation frequency at whic…
Parameter estimation for power-law distributions by maximum likelihood methods
Heiko Bauke
Distributions following a power-law are an ubiquitous phenomenon. Methods for determining the exponent of a power-law tail by graphical means are often used in practice but are int…
Coherence properties of spinor condensates at finite temperatures
Krzysztof Gawryluk, Miroslaw Brewczyk, Mariusz Gajda +1
We consider a spinor condensate of 87Rb atoms in its F=1 hyperfine state at finite temperatures. Putting initially all atoms in m_F=0 component we find that the system evolves into…