Incompressible Liquid, Stripes and Bubbles in rapidly rotating Bose atoms at $\nu=1$

TL;DR

This study numerically explores rapidly rotating Bose atoms at filling factor one with dipolar interactions, revealing stabilization of incompressible liquids and transitions to stripe and bubble phases upon increased interaction.

Contribution

It demonstrates that dipolar interactions stabilize incompressible quantum liquids at ν=1 and identifies phase transitions to stripe and bubble states with different interactions.

Findings

Moderate dipolar interaction stabilizes the incompressible liquid at ν=1.

Adding more interaction causes a collapse to compressible phases with stripes and bubbles.

Models with truncated and three-body interactions also exhibit stripe and bubble phases.

Abstract

We numerically study the system of rapidly rotating Bose atoms at the filling factor (ratio of particle number to vortex number) $\nu=1$ with the dipolar interaction. A moderate dipolar interaction stabilizes the incompressible quantum liquid at $\nu=1$. Further addition induces a collapse of it. The state after the collapse is a compressible state which has phases with stripes and bubbles. There are two types of bubbles with a different array. We also investigate models constructed from truncated interactions and the models with the three-body contact interaction. They also have phases with stripes and bubbles.