Dynamics of dipolar Atom-Molecular BEC in a double well potential: Effect of atom-molecular coherent coupling

TL;DR

This study explores the dynamics of dipolar atom-molecular Bose-Einstein condensates in a double well potential, revealing how dipole interactions and coherent coupling influence atom-molecule transfer and trapping behaviors.

Contribution

It introduces a numerical analysis of coupled GP equations for atom-molecular BECs considering dipolar and coherent interactions, highlighting their roles in condensate dynamics.

Findings

Dipolar and coherent interactions facilitate atom-molecule transfer between wells.

Absence of both interactions leads to self-trapping in the left well.

Coherent coupling signatures are observable in density distributions.

Abstract

In the present work we have studied the dynamics of dipolar atom-molecular Bose Einstein Condensates coupled via Feshbach Resonance in a double well potential. We have numerically solved four coupled GP like equations, two for left well and two for right well for this atom molecular coupled system. Our numerical results show that both the long-range dipole-dipole interaction (chosen to be positive) and the coherent coupling interaction (which is positive for bosons) facilitate the transmission of atoms and molecules from left well to the right well when the population in the right well dominates over that in the left well and is trapped for a period of time. Whereas in absence of any one of these interactions probability of transient transmission decreases. However in absence of both the interactions (dipole-dipole and coherent coupling) i.e. when only the repulsive contact interaction is present, it leads to self trapping in the left well for a period of time. It is also shown that the signature of coherent coupling between atoms and molecules on the density distribution of atoms in the double well potential is present both in absence and presence of dipole-dipole interaction.