Demonstration of Teleportation over a Fiber Link:
In an increasingly interconnected world where vast amounts of data are constantly exchanged and critical infrastructures are increasingly targeted, security in communication and information technology is becoming more important than ever. While traditional encryption methods still provide protection, they are reaching their limits with the advent of powerful Quantum Computers. Due to their unique computational capabilities, Quantum Computers have the potential to compromise many commonly used IT security mechanisms.
However, the same principles of Quantum Physics that give Quantum Computers their power can also be used to make communication more secure. Quantum Computers can be linked together, and even Quantum Networks can be built. A central concept in this context is so-called Quantum Teleportation. This involves transferring information or Quantum States from one location to another without traversing the space in between. As a result, the state of one particle can be transferred to another particle – regardless of the physical distance. This phenomenon forms the basis for future Quantum Networks.
The collaborative project Quantum Repeater.Link (QR.X) demonstrates Quantum Teleportation between a trapped ion and a telecom photon over a 14-kilometer-long optical fiber link – the so-called Saarbrücken Quantum Communication Fiber Testbed. This achievement marks a crucial step on the path toward Quantum Repeaters and Quantum Networks. Learn more in this video!
