论文标题
偶尔玻色子的条纹超稀释液体
Striped Ultradilute Liquid of Dipolar Bosons in Two Dimensions
论文作者
论文摘要
我们研究了仅限于二维平面移动的偶极原子的玻色网凝结物的相。偶极矩均在平面正常的方向上对齐。由于偶极 - 偶极相互作用的吸引力和排斥成分，偶极气具有自构型相，其量子稳定在量子波动中。此外，倾斜偶极子会调整偶极 - 偶极相互作用的各向异性，这可以触发空间密度调制。在这项工作中，我们研究了这两个方面，并研究了形成自结界相和条纹相的条件，这已经在偶极液滴实验中实现。我们使用基于jastrow-feenberg ansatz的多体波函数的超链链欧拉 - 拉格朗格优化的变分方法来研究基态特性。该方法以非扰动方式考虑了量子波动，因此也可以用于强相关的系统。
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.
