抽运衰变凝聚体中的自发旋转涡格
Spontaneous rotating vortex lattices in a pumped decaying condensate
摘要：
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方程来模拟被困的、被抽的、衰变的凝聚体，并分析了稳态下的密度和电流。在均匀泵浦下，旋转对称解是不稳定的。稳定性可以通过有限的泵浦点来恢复。然而，如果泵浦点是大于的M-Fermi云半径，然后旋转对称的解决方案取代的解决方案与自发阵列的涡旋。这些涡旋阵列的出现没有任何旋转的陷阱，自发打破旋转对称性。
英文摘要：
Injection and decay of particles in an inhomogeneous quantum condensate can significantly change its behaviour. We model trapped, pumped, decaying condensates by a complex Gross-Pitaevskii equation and analyse 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.
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