| Full text | |
| Author(s): |
Cidrim, Andre
;
dos Santos, Francisco E. A.
;
Henn, Emanuel A. L.
;
Macri, Tommaso
Total Authors: 4
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW A; v. 98, n. 2, p. 6-pg., 2018-08-15. |
| Abstract | |
Quantized vortices have been observed in a variety of superfluid systems, from He-4 to condensates of alkali-metal bosons and ultracold Fermi gases along the BEC-BCS crossover. In this article we study the stability of singly quantized vortex lines in dilute dipolar self-bound droplets. We first discuss the energetic stability region of dipolar vortex excitations within a variational ansatz in the generalized nonlocal Gross-Pitaevskii functional that includes quantum fluctuation corrections. We find a wide region where stationary solutions corresponding to axially symmetric vortex states exist. However, these singly charged vortex states are shown to be unstable, either by splitting the droplet in two fragments or by vortex-line instabilities developed from Kelvin-wave excitations. These observations are the results of large-scale fully three-dimensional simulations in real time. We conclude with some experimental considerations for the observation of such states and suggest possible extensions of this work. (AU) | |
| FAPESP's process: | 15/20475-9 - Establishment of an experimental apparatus to study dipolar quantum gases |
| Grantee: | Emanuel Alves de Lima Henn |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 17/09390-7 - Entanglement and blockade effects in ultracold atomic clouds |
| Grantee: | André Cidrim Santos |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/07276-1 - CEPOF - Optics and Photonic Research Center |
| Grantee: | Vanderlei Salvador Bagnato |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |