Spin rotons and supersolids in binary antidipolar condensates

TL;DR

This paper theoretically investigates binary antidipolar Bose-Einstein condensates in a tube, predicting a spin roton instability that leads to a supersolid phase, and explores the phase diagram and dynamic formation of supersolids.

Contribution

It introduces the concept of spin rotons in antidipolar condensates and characterizes the phase transition to supersolids in a quasi-1D system.

Findings

Identification of a spin roton and its instability

Prediction of a continuous phase transition to supersolids

Demonstration of supersolid formation after a quench

Abstract

We present a theoretical study of a mixture of antidipolar and nondipolar Bose-Einstein condensates confined to an infinite tube. We predict the presence of a spin roton and its associated instability, which triggers a continuous unmodulated--to--supersolid phase transition. We characterize the phase diagram of the binary system, ranging from the quasi-1D to the radial Thomas-Fermi (elongated 3D) regimes. We also present the dynamic formation of supersolids following a quench from the uniform miscible phase, which maintains phase coherence across the system.