Generating persistent-current superpositions in Bose-Einstein condensates using dynamic optical potentials

Renzo Testa; Donatella Cassettari

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arXiv · 2601.21144

Generating persistent-current superpositions in Bose-Einstein condensates using dynamic optical potentials

Renzo Testa·Donatella Cassettari

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Abstract

Precise and flexible manipulation of the motional state of ultracold atoms is a fundamental enabling technology for diverse applications such as quantum sensing and quantum computation. In this paper we propose a general, simple and highly efficient method to engineer the motional state of a Bose-Einstein condensate with time-dependent optical fields, which can be realized experimentally with existing light sculpting techniques. We demonstrate numerically how to engineer superpositions of persistent currents in a toroidal trap, achieving very high fidelity. We also study in detail the stability of the state over time, and we present an analytical two-state model that approximates well the evolution of the state in presence of self-interactions.

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Renzo Testa, Donatella Cassettari. 2026-01-29. Generating persistent-current superpositions in Bose-Einstein condensates using dynamic optical potentials. https://arxiv.org/abs/2601.21144

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