Zobrazeno 1 - 10
of 357
pro vyhledávání: '"Rzążewski, K"'
Publikováno v:
Acta Phys. Pol. A 143, S171 (2023)
We study the statistical properties of a gas of interacting bosons trapped in a box potential in two and three dimensions. Our primary focus is the characteristic temperature $\tchar$, i.e. the temperature at which the fluctuations of the number of c
Externí odkaz:
http://arxiv.org/abs/2306.07816
Autor:
Christensen, M. B., Vibel, T., Hilliard, A. J., Kruk, M. B., Pawłowski, K., Hryniuk, D., Rzążewski, K., Kristensen, M. A., Arlt, J. J.
Publikováno v:
Phys. Rev. Lett. 126, 153601 (2021)
Quantum systems are typically characterized by the inherent fluctuation of their physical observables. Despite this fundamental importance, the investigation of the fluctuations in interacting quantum systems at finite temperature continues to pose c
Externí odkaz:
http://arxiv.org/abs/2011.08736
Akademický článek
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Autor:
Kristensen, M. A., Christensen, M. B., Gajdacz, M., Iglicki, M., Pawłowski, K., Klempt, C., Sherson, J. F., Rzążewski, K., Hilliard, A. J., Arlt, J. J.
Publikováno v:
Phys. Rev. Lett. 122, 163601 (2019)
Fluctuations are a key property of both classical and quantum systems. While the fluctuations are well understood for many quantum systems at zero temperature, the case of an interacting quantum system at finite temperature still poses numerous chall
Externí odkaz:
http://arxiv.org/abs/1812.03064
Publikováno v:
Phys. Rev. A 95, 063622 (2017)
Thanks to their immense purity and controllability, dipolar Bose-Einstein condensates are an exemplar for studying fundamental non-local nonlinear physics. Here we show that a family of fundamental nonlinear waves - the dark solitons - are supported
Externí odkaz:
http://arxiv.org/abs/1610.02002
Publikováno v:
Phys. Rev. A 93, 023612 (2016)
We investigate separations of trapped balanced two-component atomic Fermi gases with repulsive contact interaction. Candidates for ground-state densities are obtained from the imaginary-time evolution of a nonlinear pseudo-Schr\"odinger equation in t
Externí odkaz:
http://arxiv.org/abs/1511.04873
Publikováno v:
Phys. Rev. A 91, 013621 (2015)
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 excitations. One of them represents Bogoliubov phonons, the other, as
Externí odkaz:
http://arxiv.org/abs/1402.5650
Autor:
Karpiuk, T., Deuar, P., Bienias, P., Witkowska, E., Pawlowski, K., Gajda, M., Rzazewski, K., Brewczyk, M.
Publikováno v:
Phys. Rev. Lett. 109, 205302 (2012)
Solitons, or non-destructible local disturbances, are important features of many one-dimensional (1D) nonlinear wave phenomena, from water waves in narrow canals to light pulses in optical fibers. In ultra-cold gases, they have long been sought, and
Externí odkaz:
http://arxiv.org/abs/1205.2363
Publikováno v:
Phys. Rev. Lett. 106, 135301 (2011)
We calculate the evaporative cooling dynamics of trapped one-dimensional Bose-Einstein condensates for parameters leading to a range of condensates and quasicondensates in the final equilibrium state. We confirm that solitons are created during the e
Externí odkaz:
http://arxiv.org/abs/1101.0728
Publikováno v:
Phys. Rev. A 78, 025603 (2008)
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 such vortices and show that thermal atoms are responsible for their d
Externí odkaz:
http://arxiv.org/abs/0803.2187