Quantum Secrets Can Be Teleported And Shared Between Multiple Senders And Receivers

[Thoth101]

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A novel “decentralized” protocol makes it possible to share secret information among multiple senders and receivers using quantum teleportation. According to the South Korea-based team of researchers who developed it, the new method is the first of its kind, and might be used to make the first networked quantum computers.

Quantum teleportation – a way of instantly transferring a quantum state between distant parties without actually sending a particle in that state through space – is a fundamental building block of quantum computation and communication and works thanks to quantum entanglement. This “spooky action at a distance”, as Albert Einstein called it, allows two or more interacting particles to remain linked in a manner not possible in classical physics – no matter how far apart they are.

 

Conventional quantum teleportation begins when the sender and the receiver share a pair of entangled particles (for example, photons). The sender then interacts her half of the entangled pair with a third particle in an unknown state. Next, she measures the outcome of this interaction and then communicates the result to the receiver via a classical channel. Armed with this information and a measurement on his half of the entangled pair, the receiver is thus able to recover the state of the unknown state that has been teleported.

 

Full article:

https://physicsworld.com/a/quantum-secrets-can-be-teleported-and-shared-between-multiple-senders-and-receivers/