Researchers at Leibniz University Hannover have made a groundbreaking discovery in the field of quantum internet technology. They have developed a new method to unify quantum and traditional internet, paving the way for a more secure and efficient communication network.
The quantum internet operates by transmitting information using entangled photons, which are particles of light that are linked together in a unique quantum state. This entanglement provides a level of security that is virtually impenetrable, making it an ideal solution for protecting sensitive data in computers.
Michael Kues, Head of the Institute of Photonics at Leibniz University Hannover, emphasized the importance of transmitting entangled photons through fiber optic networks to make the quantum internet a reality. The challenge lies in integrating this technology with the existing infrastructure of the conventional internet.
In their experiment, the researchers devised a „transmitter and receiver“ approach for sending entangled photons across optical fibers. They were able to modify the color of a laser pulse with a high-speed electrical signal to match the color of the entangled photon, allowing both forms of light to travel through the same optical cable without interference.
This breakthrough is significant because it enables both traditional internet data, carried by laser pulses, and quantum information, conveyed by entangled photons, to coexist in the same fiber optic cable. Previously, entangled photons consumed the full bandwidth of an optical fiber, making regular data transfer impossible. With this new approach, both types of data can share the fiber’s capacity, advancing telecommunications technology.
The researchers demonstrated for the first time that photons can be conveyed in the same color channel as laser light, opening up new possibilities for integrating the quantum internet into existing fiber optic networks. This achievement has the potential to revolutionize communication systems by enhancing security and efficiency in data transmission.
The findings of this study were published in the journal Science Advances, showcasing the innovative work being done at Leibniz University Hannover. This research represents a significant step towards bridging the gap between quantum and traditional internet technologies, bringing us closer to a more secure and interconnected digital future.