Quantum Dynamics and Statistics Properties of Atom-Molecule Bose-Einstein Condensate

TL;DR

This paper investigates the quantum and statistical behaviors of atom-molecule Bose-Einstein condensates using a two-mode boson model, revealing how nonlinear interactions influence molecular formation and quantum correlations.

Contribution

It introduces a detailed analysis of nonlinear effects on atom-molecule BEC dynamics and statistical properties, highlighting localization and superchaotic phenomena.

Findings

Nonlinearity suppresses atom-to-molecule conversion due to localization.

Superchaotic molecular pulses emerge from nonlinear effects.

Atomic field remains sub-Poissonian with anti-bunching observed.

Abstract

Based on a two-mode boson model, we study nonclassical properties of the atom-molecule Bose-Einstein condensate. The effects of nonlinear collisions on the dynamics of the molecular formation is studied both in classical and quantum treatments. We find that the conversion from atoms to molecules can be suppressed strongly due to nonlinearity-induced localization of the atomic population. In addition, we study statistical properties of the atom-molecule condensed system by calculating the intensity correlation functions numerically. We find that the effect of nonlinearity leads to the appearance of superchaotic molecular pulses, while maintaining the atomic field sub-Poissonian. The joint quantum statistical properties of the atoms and the molecules always show anti-bunching.