Variational theory for the ground state and collective excitations of an elongated dipolar condensate

被引：29

作者：

Blakie, P. Blair ^{[1
,2
]}

Baillie, D. ^{[1
,2
]}

Pal, Sukla ^{[1
,2
]}

机构：

[1] Univ Otago, Dodd Walls Ctr Photon & Quantum Technol, Dunedin 9016, New Zealand

[2] Univ Otago, Dept Phys, Dunedin 9016, New Zealand

来源：

COMMUNICATIONS IN THEORETICAL PHYSICS | 2020年 / 72卷 / 08期

关键词：

dipolar Bose-Einstein condensate; ground states; collective excitations; QUANTUM; DROPLETS;

D O I：

10.1088/1572-9494/ab95fa

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：8

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