Time-dependent wave packet dynamics calculations of cross sections for ultracold scattering of molecules

TL;DR

This paper introduces the first accurate time-dependent wave packet method for ultracold molecular scattering, enabling detailed real-time analysis of complex molecular reactions at ultracold temperatures.

Contribution

It presents a novel time-dependent wave packet approach for ultracold molecular collisions, extending quantum calculations to polyatomic systems.

Findings

First accurate time-dependent calculations for ultracold molecular scattering.

Allows analysis of bond-rearrangement and energy exchange processes.

Extends quantum ultracold reaction studies to polyatomic molecules.

Abstract

Because the de Broglie wavelength of ultracold molecules is very large, the cross sections for collisions of molecules at ultracold temperatures are always computed by the time-independent quantum scattering approach. Here, we report the first accurate time-dependent wave packet dynamics calculation for reactive scattering of ultracold molecules. Wave packet dynamics calculations can be applied to molecular systems with more dimensions and provide real-time information on the process of bond-rearrangement and/or energy exchange in molecular collisions. Our work thus makes possible the extension of rigorous quantum calculations of ultracold reaction properties to polyatomic molecules and adds a new powerful tool for the study of ultracold chemistry.