Zobrazeno 1 - 10
of 699
pro vyhledávání: '"ROONEY S"'
Publikováno v:
Phys. Rev. A 93, 063603 (2016)
We simulate the dissipative evolution of a vortex in a trapped finite-temperature dilute-gas Bose-Einstein condensate using first-principles open-systems theory. Simulations of the complete stochastic projected Gross-Pitaevskii equation for a partial
Externí odkaz:
http://arxiv.org/abs/1602.03243
Publikováno v:
Phys. Rev. A 92, 033631 (2015)
We present reduced-dimensional stochastic projected Gross-Pitaevskii equations describing regimes of confinement and temperature where a 1D or 2D superfluid is immersed in a 3D thermal cloud. The projection formalism provides both a formally rigorous
Externí odkaz:
http://arxiv.org/abs/1507.02023
Publikováno v:
Phys. Rev. A 89, 033610 (2014)
We study bright solitons in the Gross-Pitaevskii equation as they are split and recombined in a low energy system. We present new analytic results determining the general region in which a soliton may not be split on a potential barrier, and confirm
Externí odkaz:
http://arxiv.org/abs/1401.7202
Publikováno v:
Phys. Rev. E 89, 013302 (2014)
We present a method for solving the stochastic projected Gross-Pitaevskii equation (SPGPE) for a three-dimensional Bose gas in a harmonic-oscillator trapping potential. The SPGPE contains the challenge of both accurately evolving all modes in the low
Externí odkaz:
http://arxiv.org/abs/1310.0161
Publikováno v:
Phys. Rev. A 86, 053634 (2012)
We have achieved the first full implementation of the stochastic projected Gross-Pitaevskii equation for a three-dimensional trapped Bose gas at finite temperature. Our work advances previous applications of this theory, which have only included grow
Externí odkaz:
http://arxiv.org/abs/1210.0952
Publikováno v:
Phys. Rev. A 88, 063620 (2013)
Experimental stirring of a toroidally trapped Bose-Einstein condensate at high temperature generates a disordered array of quantum vortices that decays via thermal dissipation to form a macroscopic persistent current [T. W. Neely em et al. arXiv:1204
Externí odkaz:
http://arxiv.org/abs/1208.4421
Autor:
Neely, T. W., Bradley, A. S., Samson, E. C., Rooney, S. J., Wright, E. M., Law, K. J. H., Carretero-González, R., Kevrekidis, P. G., Davis, M. J., Anderson, B. P.
Publikováno v:
Phys. Rev. Lett. 111, 235301 (2013)
Under suitable forcing a fluid exhibits turbulence, with characteristics strongly affected by the fluid's confining geometry. Here we study two-dimensional quantum turbulence in a highly oblate Bose-Einstein condensate in an annular trap. As a compre
Externí odkaz:
http://arxiv.org/abs/1204.1102
Publikováno v:
Physical Review A 84, 023637 (2011)
We study the Kelvin mode excitations on a vortex line in a three-dimensional trapped Bose-Einstein condensate at finite temperature. Our stochastic Gross-Pitaevskii simulations show that the activation of these modes can be suppressed by tightening t
Externí odkaz:
http://arxiv.org/abs/1105.1189
Publikováno v:
Phys. Rev. A 81, 023630 (2010)
The decay of a vortex from a non-rotating high temperature Bose-Einstein condensate (BEC) is modeled using the stochastic projected Gross-Pitaevskii equation (SPGPE). In order to exploit the tunability of temperature in SPGPE theory while maintaining
Externí odkaz:
http://arxiv.org/abs/0912.3300
Akademický článek
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