Spontaneous rotating vortex lattices in a pumped decaying condensate
Spontaneous rotating vortex lattices in a pumped decaying condensate
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DOI：
10.1103/physrevlett.100.250401
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发表时间：
2008-06-27
影响因子：
8.6
通讯作者：
Berloff, Natalia G.
中科院分区：
文献类型：
--
作者：
Keeling, Jonathan;Berloff, Natalia G.
粒子在非均匀量子凝聚体中的注入和衰变可以显著改变其行为。我们用一个复杂的Gross-Pitaevskii方程来模拟捕获、泵送和衰变凝聚体，并分析了稳态下的密度和电流。对于均匀泵浦，旋转对称解是不稳定的。稳定可以通过一个有限的泵送点来恢复。然而，如果抽运点大于托马斯-费米云半径，则旋转对称解被具有自发旋涡阵列的解所取代。这些漩涡阵列在没有任何阱旋转的情况下产生，自发地破坏了旋转对称性。
Injection and decay of particles in an inhomogeneous quantum condensate can significantly change its behavior. We model trapped, pumped, decaying condensates by a complex Gross-Pitaevskii equation and analyze the density and currents in the steady state. With homogeneous pumping, rotationally symmetric solutions are unstable. Stability may be restored by a finite pumping spot. However if the pumping spot is larger than the Thomas-Fermi cloud radius, then rotationally symmetric solutions are replaced by solutions with spontaneous arrays of vortices. These vortex arrays arise without any rotation of the trap, spontaneously breaking rotational symmetry.