Moir\'e super-lattice structures in kicked Bose-Einstein condensates

TL;DR

This paper demonstrates how external perturbations like optical lattice kicks can create transient moiré super-lattice structures in rotating Bose-Einstein condensates, revealing new ways to manipulate superfluid density patterns.

Contribution

It introduces a method to generate and identify moiré super-lattices in BECs by combining vortex lattice symmetry with external optical kicks.

Findings

Transient moiré lattice structures appear after kicking the condensate.

Moiré patterns are identifiable via the kinetic energy spectrum.

External perturbations can control super-lattice periodicities.

Abstract

Vortex lattices in rapidly rotating Bose-Einstein condensates lead to a periodic modulation of the superfluid density with a triangular symmetry. Here we show that this symmetry can be combined with an external perturbation in order to create super-lattice structures with two or more periodicities. Considering a condensate which is kicked by an optical lattice potential, we find the appearance of transient moir\'e lattice structures, which can be identified using the kinetic energy spectrum.