Suppression of collisional decoherence

TL;DR

This paper demonstrates a continuous dynamical decoupling method that significantly suppresses collisional decoherence in cold atoms, extending coherence times and improving quantum state preservation.

Contribution

The authors introduce a continuous echo pulse technique to effectively reduce collisional decoherence in cold atom systems, achieving unprecedented coherence times.

Findings

Thirty-fold increase in coherence time using the method

Coherence times exceeding 100ms achieved

Effective suppression of collisional decoherence in cold atoms

Abstract

We employ a continuous dynamical decoupling scheme to suppress the decoherence induced by elastic collisions of cold atoms. Using a continuous echo pulse we achieve a thirty-fold increase in the coherence time of Rb87 atoms trapped in a dipole trap. Coherence times of more than 100ms are demonstrated for an ensemble with an optical depth of 120.