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arXiv · 2208.05028

Striped Ultradilute Liquid of Dipolar Bosons in Two Dimensions

Clemens Staudinger·Diana Hufnagl·Ferran Mazzanti·Robert E. Zillich
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Abstract

We investigate the phases of a Bose-Einstein condensate of dipolar atoms restricted to move in a two-dimensional plane. The dipole moments are all aligned in a direction tilted with respect to the plane normal. As a result of the attractive and repulsive components of the dipole-dipole interaction, the dipolar gas has a self-bound phase, which is stabilized by quantum fluctuations. Furthermore, tilting the dipoles tunes the anisotropy of the dipole-dipole interaction, which can trigger a spatial density modulation. In this work we study these two aspects and investigate the conditions for the formation of a self-bound and striped phase, which has been realized in experiments with dipolar droplets. We use a variational method based on the hypernetted-chain Euler-Lagrange optimization of a Jastrow-Feenberg ansatz for the many-body wave function to study the ground state properties. This method takes into account quantum fluctuations in a non-perturbative way and thus can be used also for strongly correlated systems.

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Clemens Staudinger, Diana Hufnagl, Ferran Mazzanti, Robert E. Zillich. 2022-08-09. Striped Ultradilute Liquid of Dipolar Bosons in Two Dimensions. https://doi.org/10.1103/physreva.108.033303

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