Selective quantum Zeno effect of ultracold atom-molecule scattering in dynamic magnetic fields

TL;DR

This paper demonstrates a method to selectively control ultracold atom-molecule scattering outcomes using dynamic magnetic fields, leveraging a generalized quantum Zeno effect to suppress specific inelastic transitions.

Contribution

It introduces a novel application of the quantum Zeno effect for controlling scattering channels in ultracold atom-molecule collisions with dynamic magnetic fields.

Findings

Selective suppression of inelastic scattering channels achieved.

Dynamic magnetic fields enable control over final spin states.

The method demonstrates potential for quantum state engineering in ultracold systems.

Abstract

We demonstrated that final states of ultracold scattering between atom and molecule can be selectively produced using dynamic magnetic fields of multiple frequencies. The mechanism of the dynamic magnetic field control is based on a generalized quantum Zeno effect for the selected scattering channels. In particular, we use an atom-molecule spin flip scattering to show that the transition to the selected final spin projection of the molecule in the inelastic scattering can be suppressed by dynamic modulation of coupling between the Floquet engineered initial and final states.