论文标题
波斯 - 因斯坦冷凝水的波动辅助崩溃
Fluctuation assisted collapses of Bose-Einstein condensates
论文作者
论文摘要
我们通过采用自洽的高斯状态理论来研究混合状态的散射长度，从而研究了散射长度向负值突然变化为负值的崩溃动力学。与Gross-Pitaevskii和Hartree-fock-Bogoliubov的方法相比，在我们的理论中，适当地对待了波动和三体损失。我们发现一种新型的崩溃，在波动的帮助下，扩大了原子之间的有吸引力的相互作用。此外，波动原子，熵和二阶相关函数的计算表明，折叠的气体与纯状态显着偏离。
We study the collapse dynamics of a Bose-Einstein condensate subjected to a sudden change of the scattering length to a negative value by adopting the self-consistent Gaussian state theory for mixed states. Compared to the Gross-Pitaevskii and the Hartree-Fock-Bogoliubov approaches, both fluctuations and three-body loss are properly treated in our theory. We find a new type of collapse assisted by fluctuations which amplify the attractive interaction between atoms. Moreover, the calculation of the fluctuated atoms, the entropy, and the second-order correlation function showed that the collapsed gas was significantly deviated from a pure state.
