Hybrid Quantum Systems with Collectively Coupled Spin States: Suppression of Decoherence through Spectral Hole Burning

TL;DR

This paper demonstrates that burning spectral holes in spin ensembles significantly reduces decoherence, increasing coherence times by over tenfold, thus enhancing the practicality of hybrid quantum systems for quantum information processing.

Contribution

The study introduces a simple spectral hole burning technique to suppress decoherence in spin ensemble-based hybrid quantum systems, markedly improving their coherence times.

Findings

Coherence time increased by more than an order of magnitude.

Spectral hole burning effectively reduces inhomogeneous broadening.

Enhanced potential for quantum information processing applications.

Abstract

Spin ensemble based hybrid quantum systems suffer from a significant degree of decoherence resulting from the inhomogeneous broadening of the spin transition frequencies in the ensemble. We demonstrate that this strongly restrictive drawback can be overcome simply by burning two narrow spectral holes in the spin spectral density at judiciously chosen frequencies. Using this procedure we find an increase of the coherence time by more than an order of magnitude as compared to the case without hole burning. Our findings pave the way for the practical use of these hybrid quantum systems for the processing of quantum information.