The basis of quantum key distribution can be found in quanta of light and photons. There are several challenges that still need to be solved before quantum technology is fully realized. A solution has been found.
In a paper published in the journal Science, teams led by David Novoa, Nicolas Joly and Philip Russell report a breakthrough in frequency up-conversion of single photons, based on a hollow-core photonic crystal fiber filled with hydrogen gas. A hologram of the atoms is created in the gas. This hologram is used for conversion of single photons. The system operates at a pressure-tuneable wavelength, making it potentially interesting for quantum communications, where efficient sources of indistinguishable single-photons are unavailable at wavelengths compatible with existing fiber networks.
A tool that can operate in any wavelength from the ultraviolet to the mid-IR can be created using the approach. The findings may be used to develop fiber-based tools.
More information: R. Tyumenev et al, Tunable and state-preserving frequency conversion of single photons in hydrogen, Science (2022). DOI: 10.1126/science.abn1434 Journal information: Science Citation: A step forward in modern quantum technology: Frequency conversion of single photons at arbitrary wavelengths (2022, May 6) retrieved 6 May 2022 from https://phys.org/news/2022-05-modern-quantum-technology-frequency-conversion.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
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