Excitations of a vortex line in an elongated dipolar condensate

Autor:	Lee, Au-Chen, Baillie, D., Bisset, R. N., Blakie, P. B.
Rok vydání:	2018
Předmět:	Condensed Matter - Quantum Gases
Zdroj:	Phys. Rev. A 98, 063620 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.98.063620
Popis:	We characterise the properties of a vortex line in an elongated dipolar Bose-Einstein condensate. Increasing the strength of the dipole-dipole interactions (DDIs) relative to the short ranged contact interactions we find that the system crosses over to a self-bound vortex droplet stabilized from collapse by quantum fluctuations. We calculate the quasiparticle excitation spectrum of the vortex state, which is important in characterizing the vortex response, and assessing its stability. When the DDIs are sufficiently strong we find that the vortex is dynamically unstable to quadrupolar modes. Comment: 9 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1810.08347 Zobrazit plný text záznamu View this record from Arxiv