bit-rate secure long distance quantum communication tagged posts

The core element of our quantum repeater is a cube of glass. We put two independent photons in, and as long as we can detect two photons coming out the other sides we know that we can perform entanglement swapping. Credit: Wits University

Technique paves the way for high bit-rate secure long distance quantum communication. Researchers have demonstrated entanglement swapping and teleportation of orbital angular momentum ‘patterns’ of light. This is a crucial step towards realizing a quantum repeater for high-dimensional entangled states.

Quantum communication over long distances is integral to information security and has been demonstrated in free space and fibre with two-dimensional states, recently over distances exceeding 1200 km between satellites...