Robust Solid State Quantum System Operating at 800 K

TL;DR

This paper reports a defect-based solid state single photon source in a van der Waals crystal that remains stable and maintains quantum properties at temperatures up to 800 K, advancing practical quantum technology applications.

Contribution

It introduces a novel high-temperature solid state single photon source operating at 800 K, demonstrating stability and quantum coherence at elevated temperatures.

Findings

Operates at temperatures up to 800 K

Maintains quantum properties upon heating and cooling

Represents a step towards practical quantum devices

Abstract

Realization of Quantum information and communications technologies requires robust, stable solid state single photon sources. However, most existing sources cease to function above cryogenic or room temperature due to thermal ionization or strong phonon coupling which impede their emissive and quantum properties. Here we present an efficient single photon source based on a defect in a van der Waals crystal that is optically stable and operates at elevated temperatures of up to 800 K. The quantum nature of the source and the photon purity are maintained upon heating to 800 K and cooling back to room temperature. Our report of a robust high temperature solid state single photon source constitutes a significant step to-wards practical, integrated quantum technologies for real-world environments.