论文标题
基态的变分理论和拉长偶极冷凝物的集体激发
Variational theory for the ground state and collective excitations of an elongated dipolar condensate
论文作者
论文摘要
我们在伸长（雪茄形）限制潜力中开发了一种偶极冷凝物的变分理论。我们的表述为基态及其集体激发提供了有效的一维延伸曲折理论。我们将我们的理论应用于系统中roton的特性，将变异处理与完整数值溶液进行比较。我们考虑了量子波动对旋转长度变软至零能量的散射长度的影响。
We develop a variational theory for a dipolar condensate in an elongated (cigar shaped) confinement potential. Our formulation provides an effective one-dimensional extended meanfield theory for the ground state and its collective excitations. We apply our theory to investigate the properties of rotons in the system comparing the variational treatment to a full numerical solution. We consider the effect of quantum fluctuations on the scattering length at which the roton excitation softens to zero energy.
