Interference Dynamics Simulation of Anisotropic Condensates with Multiple Vortices in Alkali Bose Gases(General)

概要

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We performed simulations of interference where two anisotropic condensates have multiple vortices. The problem of how the multiple zipper pattern (MZP) appears is investigated on the basis of the time-dependent Gross-Pitaevskii equation. The anisotropic multiple-vortex state, which is a linear combination of eigen states of anisotropic harmonic potential Hamiltonian is used to reproduce the observed MZP. Multiple vortices are expressed by high winding numbers in a calculation. In the isotropic case, the MZP can be found only in the central region with a low density due to the large vortex core. In the anisotropic and high winding number case, the MZP with several dislocations appears. In fact, the MZP is clearly seen because of high density. Each wave function of the anisotropic multiple-vortex state is divided into two parts. In short, four wave packets form the MZP. Both the large anisotropy and high winding number are required in reproducing the MZP.
2009-03-15