Scientific Results

Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity

Year: 2018

Authors: Adhikari S.K., Salasnich L.

Autors Affiliation: [Adhikari, S. K.] UNESP Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, Brazil.
[Salasnich, L.] Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Via Marzolo 8, I-35131 Padua, Italy and CNR, INO, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy

Abstract: The formation of a regular lattice of quantized vortices in a fluid under rotation is a smoking-gun signature of its superfluid nature. Here we study the vortex lattice in a dilute superfluid gas of bosonic atoms at zero temperature along the crossover from the weak-coupling regime, where the inter-atomic scattering length is very small compared to the average distance between atoms, to the unitarity regime, where the inter-atomic scattering length diverges. This study is based on high-performance numerical simulations of the time-dependent nonlinear Schrodinger equation for the superfluid order parameter in three spatial dimensions, using a realistic analytical expression for the bulk equation of state of the system along the crossover from weak-coupling to unitarity. This equation of state has the correct weak-coupling and unitarity limits and faithfully reproduces the results of an accurate multi-orbital microscopic calculation. Our numerical predictions of the number of vortices and root-mean-square sizes are important benchmarks for future experiments.

Journal/Review: SCIENTIFIC REPORTS

Volume: 8      Pages from: 8825-1  to: 8825-11

KeyWords: Gross-Pitaevskii equation; Einstein condensation; Feshbach resonances; helium II; superconductors
DOI: 10.1038/s41598-018-27146-1

Citations: 8
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-10
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

gdpr-image
This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more