Work

Electric-field control of Josephson oscillations in dipolar Bose-Einstein condensates

Year: 2025

Type: article

Abstract: We study the dynamic behavior of a Bose-Einstein condensate (BEC) with dipolar interactions when the influence of external electric fields affects the coherent tunneling properties. Here, we propose a tunable platform based on BECs where Josephson oscillations can be engineered and modulated through external electric fields. We develop a theoretical and numerical framework that reveals how electric fields affect intercondensate tunneling, phase dynamics, and collective excitations. By employing a coupled set of Gross-Pitaevskii equations with adiabatic elimination of excited states, we demonstrate field-induced tuning of Josephson frequencies and a transition from contact to dipole-dominated regimes. These findings corroborate theoretical predictions about the sensitivity of dipolar BECs to external fields and deepen our understanding of quantum coherence and tunneling in long-range interacting quantum systems.

Source: Physical review. B./Physical review. B

DOI: 10.1103/yl3d-2g1y

Authors: David Galvez-Poblete, Roberto E. Troncoso, Guillermo Romero, Alvaro S. Nunez, Sebastian Allende

Institutions: Universidad de Santiago de Chile, Center for the Development of Nanoscience and Nanotechnology, University of Tarapacá, University of Chile

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Santiago de Chile, Fondo Nacional de Desarrollo Científico y Tecnológico

Awards: G1029889055, G3218492412, G6206335318, G621353459