Classical and quantum analysis of a heterotriatomic molecular Bose-Einstein-condensate model

TL;DR

This paper analyzes a heterotriatomic molecular Bose-Einstein condensate model using classical and quantum methods, revealing how atomic population imbalance influences the system's ground-state properties and bifurcation scenarios.

Contribution

It introduces an integrable Hamiltonian model for heterotriatomic BECs and explores its classical bifurcations and quantum ground-state sensitivity to population imbalance.

Findings

Ground-state properties depend on atomic population imbalance.

Bifurcation analysis reveals three distinct parameter regimes.

Quantum analysis confirms sensitivity through energy gap and fidelity.

Abstract

We investigate an integrable Hamiltonian modeling a heterotriatomic molecular Bose-Einstein condensate. This model describes a mixture of two species of atoms in different proportions, which can combine to form a triatomic molecule. Beginning with a classical analysis, we determine the fixed points of the system. Bifurcations of these points separate the parameter space into different regions. Three distinct scenarios are found, varying with the atomic population imbalance. This result suggests the ground-state properties of the quantum model exhibit a sensitivity on the atomic population imbalance, which is confirmed by a quantum analysis using different approaches, such as the ground-state expectation values, the behavior of the quantum dynamics, the energy gap, and the ground-state fidelity.