Two-particle tunneling and the impact of interaction

TL;DR

This paper investigates how two bosons tunnel in a double-well potential, focusing on how different interaction types and strengths influence correlated and uncorrelated tunneling behaviors.

Contribution

It provides a detailed analysis of two-particle tunneling dynamics considering various interaction types and their effects on tunneling resonances.

Findings

Resonances cause transitions between correlated and uncorrelated tunneling.

Interaction type affects the abundance of tunneling resonances.

Tunable interaction strength influences tunneling behavior and resonance conditions.

Abstract

We analyze the tunneling of two bosons in a double-well, for contact, soft-, and hard-core Coulomb interaction of tunable strength. Transitions from correlated to uncorrelated tunneling of the left well's two-particle ground state are due to resonances with states with one particle in either well. Their abundance and dependence on the interaction strength is indicative of the interaction type.