Precessional motion of a vortex in a finite-temperature Bose-Einstein condensate

TL;DR

This paper investigates the precessional dynamics of vortices in finite-temperature Bose-Einstein condensates, extending zero-temperature models by incorporating finite temperature effects through Popov and semiclassical approximations.

Contribution

It introduces a detailed analysis of vortex precession at finite temperatures using advanced theoretical frameworks, bridging a gap in existing zero-temperature studies.

Findings

Precessional motion depends on the sign of the lowest excitation energy.

Finite temperature effects significantly influence vortex dynamics.

The rotating frame provides insights into vortex behavior at different temperatures.

Abstract

We study the precessing motion of a vortex in a Bose-Einstein condensate of atomic gases. In addition to the former zero-temperature studies, finite temperature systems are treated within the Popov and semiclassical approximations. Precessing vortices are discussed utilizing the rotating frame of reference. The relationship between the sign of the lowest excitation energy and the direction of precession is discussed in detail.