Zobrazeno 1 - 10
of 145
pro vyhledávání: '"Groszek, A. J."'
Publikováno v:
Phys. Rev. A 110, 013311 (2024)
An easy-plane ferromagnetic spin-1 Bose gas undergoes two Berezinskii-Kosterlitz-Thouless (BKT) transitions, associated with mass and spin superfluidity respectively. We study the effect of axial magnetization on the superfluid properties of this sys
Externí odkaz:
http://arxiv.org/abs/2404.03178
The second law of thermodynamics posits that in closed macroscopic systems the rate of entropy production must be positive. However, small systems can exhibit negative entropy production over short timescales, seemingly in contradiction with this law
Externí odkaz:
http://arxiv.org/abs/2308.03397
Autor:
Woffinden, Charles W., Groszek, Andrew J., Gauthier, Guillaume, Mommers, Bradley J., Bromley, Michael. W. J., Haine, Simon A., Rubinsztein-Dunlop, Halina, Davis, Matthew J., Neely, Tyler W., Baker, Mark
Publikováno v:
SciPost Phys. 15, 128 (2023)
We demonstrate the use of a ring-shaped Bose-Einstein condensate as a rotation sensor by measuring the interference between two counter-propagating phonon modes imprinted azimuthally around the ring. We observe rapid decay of the excitations, quantif
Externí odkaz:
http://arxiv.org/abs/2212.11617
Publikováno v:
Phys. Rev. Research 5, L012045 (2023)
A two-dimensional (2D) spin-1 Bose gas exhibits two Berezenskii-Kosterlitz-Thouless (BKT) transitions in the easy-plane ferromagnetic phase. The higher temperature transition is associated with superfluidity of the mass current determined predominant
Externí odkaz:
http://arxiv.org/abs/2207.14497
Superfluid flow past a potential barrier is a well studied problem in ultracold Bose gases, however, fewer studies have considered the case of flow through a disordered potential. Here we consider the case of a superfluid flowing through a channel co
Externí odkaz:
http://arxiv.org/abs/2201.11887
We perform an analysis of the supercooled state in an analogue of an early universe phase transition based on a one dimensional, two-component Bose gas with time-dependent interactions. We demonstrate that the system behaves in the same way as a ther
Externí odkaz:
http://arxiv.org/abs/2104.07428
We consider geometric phases of mobile quantum vortices in superfluid Bose-Einstein condensates. Haldane and Wu [Phys. Rev. Lett. 55, 2887 (1985)] showed that the geometric phase, $\gamma_{\mathcal C}=2\pi N_{\mathcal C}$, of such a vortex is determi
Externí odkaz:
http://arxiv.org/abs/2101.07438
Publikováno v:
Phys. Rev. Research 3, 013212 (2021)
We study the phase ordering dynamics of a uniform Bose gas in two dimensions following a quench into the ordered phase. We explore the crossover between dissipative and conservative evolution by performing numerical simulations within the classical f
Externí odkaz:
http://arxiv.org/abs/2006.13284
Publikováno v:
SciPost Phys. 8, 039 (2020)
We numerically model decaying quantum turbulence in two-dimensional disk-shaped Bose-Einstein condensates, and investigate the effects of finite temperature on the turbulent dynamics. We prepare initial states with a range of condensate temperatures,
Externí odkaz:
http://arxiv.org/abs/1903.05528
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