Long Range Interactions

This research explores ultracold quantum gases where atoms interact through dipolar forces—long-range interactions that depend on the relative orientation between particles. These interactions give rise to novel quantum phases and excitation behaviors not found in systems with contact interactions. We focus on atomtronics, an emerging field that uses atomic matter waves to develop quantum technologies for sensing, metrology, and simulation. Dipolar atoms are particularly promising for atomtronics because their tunable, anisotropic interactions offer new possibilities for designing quantum devices.

We extend previous work on quantum circuit dynamics to include dipolar interactions within the Bose-Hubbard framework. Our approach involves characterizing both single circuits and coupled configurations by analyzing entanglement, correlations, and condensation. We also investigate their dynamics, looking at quantized vortices, transport properties, and coherent quantum phase slips, which could serve as building blocks for quantum bits. In parallel, we explore how artificial gauge potentials can make neutral atoms mimic charged particles in electromagnetic fields. By engineering gauge fields that depend on density, we create systems with chiral properties where the direction of motion matters, leading to phenomena like chiral solitons in rotating rings.