# Patterned Supersolids in Dipolar Bose Systems

## TL;DR

This paper uses Quantum Monte Carlo simulations to explore the phase diagram of dipolar bosons, revealing a broad supersolid phase with various crystalline patterns and a roton minimum near crystallization.

## Contribution

It provides the first detailed phase diagram of dipolar bosons including a broad supersolid region influenced by interaction range and density.

## Key findings

- Supersolid phase exists over a broad parameter range.
- Crystalline patterns depend on density and interaction range.
- A roton minimum appears near the transition to crystallization.

## Abstract

We study by means of first principle Quantum Monte Carlo simulations the ground state phase diagram of a system of dipolar bosons with aligned dipole moments, and with the inclusion of a two-body repulsive potential of varying range. The system is shown to display a supersolid phase in a relatively broad region of the phase diagram, featuring different crystalline patterns depending on the density and on the range of the repulsive part of the interaction (scattering length). The supersolid phase is sandwiched between a classical crystal of parallel filaments and a homogeneous superfluid phase. We show that a "roton" minimum appears in the elementary excitation spectrum of the superfluid as the system approaches crystallization.