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of 220
pro vyhledávání: '"Wright, K C"'
We have measured the threshold for creating long-lived excitations when a toroidal Bose-Einstein condensate is stirred by a rotating (optical) barrier of variable height. When the barrier height is on the order of or greater than half of the chemical
Externí odkaz:
http://arxiv.org/abs/1312.0988
Autor:
Murray, Noel, Krygier, Michael, Edwards, Mark, Wright, K. C., Campbell, G. K., Clark, Charles W.
This paper reports the results of a theoretical and experimental study of how the initial circulation of ring-shaped Bose-Einstein condensates (BECs) can be probed by time-of-flight (TOF) images. We have studied theoretically the dynamics of a BEC af
Externí odkaz:
http://arxiv.org/abs/1309.2257
We have observed well-defined phase slips between quantized persistent current states around a toroidal atomic (23Na) Bose-Einstein condensate. These phase slips are induced by a weak link (a localized region of reduced superfluid density) rotated sl
Externí odkaz:
http://arxiv.org/abs/1208.3608
Autor:
Ramanathan, A., Wright, K. C., Muniz, S. R., Zelan, M., Hill III, W. T., Lobb, C. J., Helmerson, K., Phillips, W. D., Campbell, G. K.
Publikováno v:
Phys. Rev. Lett. 106, 130401 (2011)
We have created a long-lived (~ 40 s) persistent current in a toroidal Bose-Einstein condensate held in an all-optical trap. A repulsive optical barrier creates a tunable weak link in the condensate circuit, which can affect the current around the lo
Externí odkaz:
http://arxiv.org/abs/1101.0019
Publikováno v:
Phys. Rev. A 82, 033607 (2010)
We study the phase-fluctuating condensate regime of ultra-cold atoms trapped in a ring-shaped trap geometry, which has been realized in recent experiments. We first consider a simplified box geometry, in which we identify the conditions to create a s
Externí odkaz:
http://arxiv.org/abs/1007.0281
Publikováno v:
Phys.Rev.Lett.103:250401,2009
We present the first experimental realization and characterization of two-dimensional skyrmions and half-skyrmions in a spin-2 Bose-Einstein condensate. The continuous rotation of the local spin of the skyrmion through an angle of pi (and half-skyrmi
Externí odkaz:
http://arxiv.org/abs/0910.4918
We use Raman-detuned laser pulses to achieve spatially-varying control of the amplitude and phase of the spinor order parameter of a Bose-Einstein condensate. We present experimental results confirming precise radial and azimuthal control of amplitud
Externí odkaz:
http://arxiv.org/abs/0812.0973
We investigate amplitude and phase control of the components of the spinor order parameter of a 87Rb Bose-Einstein condensate. By modeling the interaction of the multilevel atomic system with a pair of Raman-detuned laser pulses, we show that it is p
Externí odkaz:
http://arxiv.org/abs/0808.1703
Publikováno v:
Weather, Climate, and Society, 2015 Oct 01. 7(4), 321-332.
Externí odkaz:
https://www.jstor.org/stable/24907472
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