相互作用在跨音速流动原子凝聚体中的作用
On the role of interactions in trans-sonically flowing atomic condensates
摘要：
我们提供了一个流动的原子玻色-爱因斯坦凝聚体的物理学的联合数值分析研究的外部陷阱和一个步骤的潜力，加速原子的凝聚创造一对相邻的黑洞和白洞的视野。特别是，我们专注于快速增长的密度调制模式，出现在超音速区域，实验观察到的功能，与黑洞激光现象。对相互作用在这一过程中的作用的直接评估表明，实验数据的解释是原子波的线性干涉，而不是集体效应。我们的结论进一步支持的薛定谔方程的艾里波函数的解析解。
英文摘要：
We provide a joint numerical-analytical study of the physics of a flowing atomic Bose-Einstein condensate in the combined presence of an external trap and a step potential which accelerates the atoms out of the condensate creating a pair of neighbouring black- and white- hole horizons. In particular, we focus on the rapidly growing density modulation pattern that appears in the supersonic region, an experimentally observed feature that was related to black-hole lasing phenomena. A direct assessment of the role of interactions in this process suggests an interpretation of the experimental data in terms of linear interference of atomic waves rather than collective effects. Our conclusions are further supported by an analytical solution of the Schrodinger equation in terms of Airy wavefunctions.
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