Work

Vector dark-antidark solitary waves in multicomponent Bose-Einstein condensates

Year: 2016

Type: article

Abstract: Multicomponent Bose-Einstein condensates exhibit an intriguing variety of nonlinear structures. In recent theoretical work [C. Qu, L. P. Pitaevskii, and S. Stringari, Phys. Rev. Lett. 116, 160402 (2016)], the notion of magnetic solitons has been introduced. Here we examine a variant of this concept in the form of vector dark-antidark solitary waves in multicomponent Bose-Einstein condensates (BECs). We first provide concrete experimental evidence for such states in an atomic BEC and subsequently illustrate the broader concept of these states, which are based on the interplay between miscibility and intercomponent repulsion. Armed with this more general conceptual framework, we expand the notion of such states to higher dimensions presenting the possibility of both vortex-antidark states and ring-antidark-ring (dark soliton) states. We perform numerical continuation studies, investigate the existence of these states, and examine their stability using the method of Bogoliubov--de Gennes analysis. Dark-antidark and vortex-antidark states are found to be stable for broad parametric regimes. In the case of ring dark solitons, where the single-component ring state is known to be unstable, the vector entity appears to bear a progressively more and more stabilizing role as the intercomponent coupling is increased.

Source: Physical Review A

DOI: 10.1103/physreva.94.053617

Authors: I. Danaila, M. A. Khamehchi, V. Gokhroo, P. Engels, P. G. Kevrekidis

Institutions: Laboratoire de Mathématiques Raphaël Salem, Université de Rouen Normandie, Washington State University, University of Massachusetts Amherst

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Agence Nationale de la Recherche, European Research Council, Seventh Framework Programme

Awards: Collaborative Research: New Directions in Atomic Bose-Einstein Condensates, Quantum Hydrodynamics with Multicomponent and Dispersion-Managed Degenerate Gases, OP: Collaborative Research: Non-Hamiltonian Wave Dynamics in Atomic & Optical Models, Bose-Einstein Condensates: Advanced SIMulation Deterministic and Stochastic Computational Models, HPC Implementation, Simulation of Experiments