Nonlinear resonances in delta-kicked Bose-Einstein condensates.
Nonlinear resonances in delta-kicked Bose-Einstein condensates.
复制标题
δ-踢玻色-爱因斯坦凝聚体中的非线性共振。
DOI：
10.1103/physrevlett.102.014102
复制
发表时间：
2009
影响因子：
8.6
通讯作者：
Monteiro TS
中科院分区：
文献类型：
--
作者：
Monteiro TS
研究了原子间相互作用对被踢冷原子的影响。我们发现，最清晰的签名的非线性动力学是一个令人惊讶的突然切断，出现在领先的共振。我们发现，这是由于一个激发路径相结合的Beliaev和朗道过程，与一些类比的非线性自陷。对动力学不稳定性的研究揭示了非线性的进一步症状，如指数振荡。
We investigate the effect of atomic interactions on-kicked cold atoms. We show that the clearest signature of the nonlinear dynamics is a surprisingly abrupt cutoff that appears on the leading resonances. We show that this is due to an excitation path combining both Beliaev and Landau processes, with some analogies to nonlinear self-trapping. Investigation of dynamical instability reveals further symptoms of nonlinearity such as a regime of exponential oscillations.