Infinite Lattices of Vortex Molecules in Rabi-Coupled Condensates


Type
Article
Change log
Authors
Uranga, B Mencia 
Abstract

Vortex molecules can form in a two component superfluid when a Rabi field drives transitions between the two components. We study the ground state of an infinite system of vortex molecules in 2D, using a numerical scheme which makes no use of the lowest Landau level approximation. We find the ground state lattice geometry for different values of inter-component interactions and strength of the Rabi field. In the limit of large field when molecules are tightly bound, we develop a complimentary analytical description. The energy governing the alignment of molecules on a triangular lattice is found to correspond to that of an infinite system of 2D quadrupoles, which may be written in terms of an elliptic function Q(zij;ω1,ω2). This allows for a numerical evaluation of the energy which enables us to find the ground state configuration of the molecules.

Description
Keywords
cond-mat.quant-gas, cond-mat.quant-gas
Journal Title
Physical Review A - Atomic, Molecular, and Optical Physics
Conference Name
Journal ISSN
2469-9926
2469-9934
Volume Title
97
Publisher
American Physical Society
Sponsorship
Engineering and Physical Sciences Research Council (EP/P034616/1)
Engineering and Physical Sciences Research Council (EP/M506485/1)
BMU and AL would like to acknowledge EPSRC under Grants EP/M506485/1 and EP/P034616/1 respectively.