Nonlinear dressed states at the miscibility-immiscibility threshold

TL;DR

This paper investigates nonlinear dressed states in a two-component Bose-Einstein condensate at the miscibility-immiscibility threshold, combining experimental observations with numerical simulations to reveal their connection to soliton solutions.

Contribution

It introduces the concept of nonlinear dressed states in a BEC system and demonstrates their connection to dark-bright solitons through bifurcation analysis.

Findings

Excellent agreement between experiment and simulations.

Identification of stationary nonlinear dressed states.

Connection to dark-bright soliton solutions.

Abstract

The dynamical evolution of spatial patterns in a complex system can reveal the underlying structure and stability of stationary states. As a model system we employ a two-component rubidium Bose-Einstein condensate at the transition from miscible to immiscible with the additional control of linear interconversion. Excellent agreement is found between the detailed experimental time evolution and the corresponding numerical mean-field computations. Analyzing the dynamics of the system, we find clear indications of stationary states that we term nonlinear dressed states. A steady state bifurcation analysis reveals a smooth connection of these states with dark-bright soliton solutions of the integrable two-component Manakov model.