Phase diagram of dipolar bosons in 2D with tilted polarization

Abstract

We analyze the ground state of a system of dipolar bosons moving in the $XY$ plane and such that their dipolar moments are all aligned in a fixed direction in space. We focus on the general case where the polarization field forms a generic angle $\alpha$ with respect to the $Z$ axis. We use the Path Integral Ground State method to analyze the static properties of the system as both $\alpha$ and the density $n$ vary over a wide range were the system is stable. We use the maximum of the static structure function as an order parameter to characterize the different phases and the transition lines among them. We find that aside of a superfluid gas and a solid phase, the system reaches a stripe phase at large tilting angles that is entirely induced by the anisotropic character of the interaction. We also show that the quantum phase transition from the gas to the stripe phase is of second order, and report approximate values for the critical exponents.

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References in corpus (6)

• Strongly correlated 2D quantum phases with cold polar molecules: controlling the shape of the interaction potential
• Stabilizing a purely dipolar quantum gas against collapse
• Quantum phase transition in a two-dimensional system of dipoles
• Quantum phases of a Two-Dimensional Dipolar Fermi Gas
• Spontaneous inhomogeneous phases in ultracold dipolar Fermi gases
• Two-dimensional Bose gas of tilted dipoles: roton instability and condensate depletion

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• Tilted dipolar bosons in the quasi-two-dimensional regime: From liquid stripes to droplets
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• Finite temperature instabilities of 2D dipolar Bose gas at arbitrary tilt angle
• Strongly dipolar molecular Bose-Einstein condensates: From few- to many-body physics