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

• URL: http://arxiv.org/abs/2601.21144v1
• Date: Thu, 29 Jan 2026 00:53:24 GMT
• Title: Generating persistent-current superpositions in Bose-Einstein condensates using dynamic optical potentials
• Authors: Renzo Testa, Donatella Cassettari,
• Abstract summary: We propose a method to engineer the motional state of a Bose-Einstein condensate with time-dependent optical fields.<n>We show numerically how to engineer superpositions of persistent currents in a toroidal trap, achieving very high fidelity.<n>We present an analytical two-state model that approximates well the evolution of the state in presence of self-interactions.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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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