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arXiv 1101.5533cond-mat.quant-gas
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凝聚体碰撞中散射原子的平均场效应

Mean field effects on the scattered atoms in condensate collisions

P. Deuar, P. Ziń, J. Chwedeńczuk, M. Trippenbach

备注：
6 pages, 4 figures
发表信息：
Eur. Phys. J. D 65, 19 (2011)
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摘要：

本文研究了两个玻色-爱因斯坦凝聚体在超声速下的碰撞，并着重讨论了散射原子的晕。这个光环是实验最重要的特征，也是各种理论方法的绝佳试验场。特别是，我们发现，典型的减少Bogoliubov描述，常用的，往往是不准确的参数进行实验的区域。令人惊讶的是，除了晕对创建条款，应该考虑到剩余的凝聚和上凝聚对创建的演变平均场。我们提出的例子中的差异是显而易见的，并在减少描述仍然成立。

英文摘要：

We consider the collision of two Bose Einstein condensates at supersonic velocities and focus on the halo of scattered atoms. This halo is the most important feature for experiments and is also an excellent testing ground for various theoretical approaches. In particular we find that the typical reduced Bogoliubov description, commonly used, is often not accurate in the region of parameters where experiments are performed. Surprisingly, besides the halo pair creation terms, one should take into account the evolving mean field of the remaining condensate and on-condensate pair creation. We present examples where the difference is clearly seen, and where the reduced description still holds.

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