Monday 03 March 2025
A breakthrough in the field of quantum communication has been achieved, allowing for more efficient and reliable transmission of entangled photons over long distances. The new technique, developed by a team of researchers at the University of Bonn, uses a type of fiber optic cable filled with hydrogen gas to convert single photons from one wavelength to another.
The challenge in transmitting entangled photons is that they are extremely sensitive to their environment and can easily become decoherent, or lose their quantum properties. This makes it difficult to transmit them over long distances without losing their usefulness for quantum communication.
To overcome this issue, the researchers developed a technique called coherent Stokes Raman scattering (CSRS), which uses a pump laser to stimulate the hydrogen gas in the fiber optic cable and convert the entangled photons to a different wavelength. The resulting signal is much stronger and more stable than previous methods, allowing for more reliable transmission over longer distances.
One of the key advantages of this technique is its ability to convert single photons from one wavelength to another without losing their quantum properties. This means that entangled photons can be transmitted over long distances without becoming decoherent, making it possible to use them for secure communication.
The researchers tested their technique by transmitting entangled photons over a distance of 6 centimeters and achieving an efficiency of 5.2 x 10^-7. While this may not seem like a lot, it’s a significant improvement over previous methods and demonstrates the potential of CSRS for long-distance quantum communication.
In addition to its potential applications in quantum communication, the technique also has implications for other fields such as chemistry and materials science. The ability to convert single photons from one wavelength to another could be used to study the properties of molecules and materials at a much deeper level than is currently possible.
Overall, this breakthrough represents an important step forward in the development of quantum communication technology and has the potential to enable new applications in fields such as chemistry, materials science, and more.
Cite this article: “Quantum Leap: Breakthrough in Entangled Photon Transmission Over Long Distances”, The Science Archive, 2025.
Quantum Communication, Entangled Photons, Fiber Optic Cables, Hydrogen Gas, Coherent Stokes Raman Scattering, Csrs, Quantum Properties, Decoherence, Long-Distance Transmission, Photon Conversion.
