Controllable Josephson-Like Tunneling in Two-Component Bose-Einstein Condensates Coupled with Microwave via Feshbach Resonance and Trapping Potential

TL;DR

This paper proposes a method to control Josephson-like tunneling in two-component Bose-Einstein condensates using microwave coupling, Feshbach resonance, and trap geometry, enabling precise oscillation control and revealing different oscillation behaviors.

Contribution

It introduces a novel scheme for controlling tunneling dynamics in BECs through combined manipulation of interactions and trapping potential, with potential experimental applications.

Findings

Achieved control of tunneling oscillations via Feshbach resonance and trap aspect ratio.

Demonstrated transition from damped to perfect periodic oscillations.

Identified two distinct oscillation types in response to interaction modulation.

Abstract

We put forward a scheme for controlling Josephson-like tunneling in two-component Bose-Einstein condensates coupled with microwave field via Feshbach resonance and tuning aspect ratio of trapping potential. We prove how to realize a perfect periodic oscillation from a fast damped and irregular oscillation on relative number of atoms in future experiment. In particular, intensity of Josephson-like tunneling can be successfully controlled through controlling speed of recovering the initial value of intra-atomic interaction and aspect ratio of trapping potential. Interestingly, we find that relative number of atoms represents two different types of oscillation in respond to periodic modulation of attractive intra-atomic interaction.