论文标题
耦合伸长的玻璃纤维冷凝物中准粒子的分散关系和自定位
Dispersion relations and self-localization of quasiparticles in coupled elongated Bose-Einstein condensates
论文作者
论文摘要
我们介绍了Bogoliubov准粒子在两个耦合的伸长的Bose-Einstein冷凝物中的光谱和分散的详细研究。我们开发了一个可解析的模型，该模型近似于两个无限均匀的冷凝水，并将其预测与对现实捕获系统的数值模拟进行比较。尽管比较显示了两个模型之间的合理一致性，但它们也表现出频谱中几种异常的Bogoliubov模式的存在。这些模式在能量和动量中都表现出堕落，以及坐标空间中的自定位。
We present a detailed study of the spectrum and dispersion of Bogoliubov quasiparticles in two coupled elongated Bose-Einstein condensates. We develop an analytically solvable model that approximates two infinite homogeneous condensates and compare its predictions to a numerical simulation of a realistic trapped system. While the comparisons show a reasonable agreement between the two models, they also manifest the existence of several anomalous Bogoliubov modes in the spectrum. These modes show degeneracy in both energy and momentum together with self-localization in the coordinate space.
