Dynamical excitations in the collision of 2D Bose-Einstein condensates

TL;DR

This paper uses simulations to study the collision dynamics of two-component quasi-2D Bose-Einstein condensates, revealing different damping regimes and how initial phase differences influence internal excitations.

Contribution

It provides new insights into the damping regimes and excitation behaviors specific to 2D BEC collisions, differing from previous 1D studies.

Findings

Identification of under, over, and critically damped regimes in dipole oscillations

Internal excitations depend on initial phase difference in the overdamped regime

Distinct behavior from quasi-1D BEC collision studies

Abstract

We carry out simulations of the collision of two components of an adiabatically divided, quasi-2D BEC. We identify under, over and critically damped regimes in the dipole oscillations of the components according to the balance of internal and centre-of-mass (c.m.) energies of the components and investigate the creation of internal excitations. We distinguish the behaviour of this system from previous studies of quasi-1D BEC's. In particular we note that the nature of the internal excitations is only essentially sensitive to an initial phase difference between the components in the overdamped regime.