Confined Vortex Matter with Anisotropic Interaction

Wenzhao Li, Xiaoyu Ma, Boldizsár Jankó +1 more

Biao Dong, Xiao-fei Zhang, YongChang Zhang

The ability to engineer topological states of matter with light is a central goal of quantum optics. We demonstrate that the anisotropic dipole-dipole interaction (DDI), tunable via optical Feshbach resonances, provides a powerful optical knob for controlling quantized vortices in quantum ferrofluids. We show that DDI-induced magnetostriction, which elongates the atomic cloud, acts as an effective optical lensing effect that reduces the transverse condensate size. This dramatically lowers the critical rotation frequency for vortex nucleation, enabling the formation of vortex lattices at interaction strengths previously inaccessible due to collapse. Our work establishes a general all-optical framework for sculpting topological excitations in magnetic atoms, with implications for quantum simulation and the study of anisotropic quantum turbulence.

Maria Solyanik‐Gorgone

Lijuan Jia, Anbang Wang, Su Yi

We investigated the low-lying collective excitations of quasi-two-dimensional dipolar Bose-Einstein condensates confined in a rotating harmonic potential using the Bogoliubov--de Gennes equation. By varying the trap rotation frequency and dipolar interaction strength, we show how the anisotropic dipole-dipole interaction modifies the collective excitations of the condensates. In particular, under strong dipolar interaction, the vortex-displacement excitations differ significantly from the nondipolar case.

Zhi Tan, Huilin Gong, Bo Zhu +2 more

Abstract We study construction and dynamics of two-dimensional (2D) anisotropic vortex-bright (VB) soliton in spinor dipolar Bose-Einstein condensates confined in a 2D optical lattice (OL), with two localized components linearly mixed by the spin-orbit coupling and long-range dipole-dipole interaction (DDI). It is found that the OL and DDI can support stable anisotropic VB soliton in the present setting for arbitrarily small value of norm N. We then present a new method via examining the mean square error of norm share of bright component to implement stability analysis. It is revealed that one can control the stability of anisotropic VB soliton only by adjusting OL depth for a fixed DDI. In addition, the dynamics of the anisotropic VB soliton was studied by applying the kick to them. The mobility of the single kicked VB solition is Rabbi-like oscillation. However, for the collision dynamics of two kicked anisotropic VB solitons, their properties mainly depend on their initial distance and OL, and they can realize the transition from the bright component to the vortex component. Our work may provides a convenient way to prepare and manipulate anisotropic VB soliton in high dimensional space.

Tyler W. Neely, Guillaume Gauthier, Matthew T. Reeves +7 more