Quantized vortices in interacting gauge theories
Quantized vortices in interacting gauge theories
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相互作用规范理论中的量子化涡旋
DOI:
10.1088/0953-4075/49/1/015304
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Butera S
中科院分区:
文献类型:
--
作者:
Butera S
We consider a two-dimensional weakly interacting ultracold Bose gas whose constituents are two-level atoms. We study the effects of a synthetic density-dependent gauge field that arises from laser–matter coupling in the adiabatic limit with a laser configuration such that the single-particle zeroth-order vector potential corresponds to a constant synthetic magnetic field. We find a new exotic type of current nonlinearity in the Gross–Pitaevskii equation which affects the dynamics of the order parameter of the condensate. We investigate the rotational properties of this system in the Thomas–Fermi limit, focusing in particular on the physical conditions that make the existence of a quantized vortex in the system energetically favourable with respect to the non-rotating solution. We point out that two different physical interpretations can be given to this new nonlinearity: firstly it can be seen as a local modification of the mean field coupling constant, whose value depends on the angular momentum of the condensate. Secondly, it can be interpreted as a density modulated angular velocity given to the cloud. Looking at the problem from both of these viewpoints, we show that the effect of the new nonlinearity is to induce a rotation to the condensate, where the transition from non-rotating to rotating states depends on the density of the cloud.
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影响因子:
8.6
作者:
S. Greschner;G. Sun;D. Poletti;L. Santos
通讯作者:
S. Greschner;G. Sun;D. Poletti;L. Santos
影响因子:
56.9
作者:
Abo-Shaeer, JR;Raman, C;Ketterle, W
通讯作者:
Ketterle, W
影响因子:
8.6
作者:
Edmonds, M. J.;Valiente, M.;Oehberg, P.
通讯作者:
Oehberg, P.
影响因子:
2.9
作者:
Jun Zheng;B. Xiong;G. Juzeliūnas;Da
通讯作者:
Da