Enhancing molecular conversion efficiency by a magnetic field pulse sequence

TL;DR

This paper introduces a magnetic field pulse sequence method, inspired by Ramsey experiments, to significantly improve atom-to-molecule conversion efficiency near Feshbach resonances.

Contribution

It presents a novel pulse sequence approach, based on mean-field theory and fixed point analysis, to enhance molecular conversion efficiency.

Findings

Higher atom-to-molecule conversion efficiency achieved

Optimal pulse durations identified for maximum conversion

Demonstrates effectiveness of magnetic pulse sequences in quantum control

Abstract

We propose a strategy to enhance the atom-to-molecule conversion efficiency near a Feshbach resonance. Based on the mean-field approximation, we derive the fixed point solutions of the classical Hamiltonian. Rabi oscillation between the atomic and molecular states around fixed point solutions and its oscillation period are discussed. By designing a sequence of magnetic field pulses in analogy with Ramsey experiments, we show that a much higher atom-to-molecule conversion efficiency can be accessed by tuning the pulse durations appropriately.