Electric-Field Control of Josephson Oscillations in Dipolar Bose-Einstein Condensates

TL;DR

This paper explores how external electric fields can control Josephson oscillations in dipolar Bose-Einstein condensates, enabling tunable quantum coherence and tunneling properties in long-range interacting systems.

Contribution

It introduces a theoretical framework demonstrating electric-field tuning of Josephson frequencies and regime transitions in dipolar BECs, advancing control over quantum tunneling phenomena.

Findings

Electric fields modulate Josephson oscillation frequencies.

Transition from contact to dipole-dominated tunneling regimes.

Enhanced understanding of field-sensitive quantum coherence.

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 frame-work 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.