Quantum Teleportation Breakthrough Sends 5 States at Once

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Quantum Teleportation Breakthrough Sends 5 States at Once




Quantum teleportation is a method for transferring the quantum state of a particle or field from one location to another without physically moving the particle itself. It relies on a phenomenon known as quantum entanglement, in which two systems share strong correlations that cannot be explained by classical physics. 
A team in China has demonstrated the simultaneous teleportation of multiple sideband qumodes in a continuous-variable system, overcoming a longstanding technical barrier.
Quantum teleportation is one of the key tricks behind entanglement-based quantum communication. It does not move matter from place to place. Instead, it transfers the information that defines a quantum state from one location to another by combining two resources: shared entanglement and an ordinary classical message.

In many continuous-variable experiments, that transfer has effectively been a one-at-a-time process. Researchers have usually teleported just a single sideband qumode, which you can think of as one distinct frequency channel riding on an optical field.

That limitation matters because real communication systems gain power by sending many channels in parallel, not by taking turns. Turning quantum teleportation into something that can handle multiple channels at once has been a stubborn hurdle.
Demonstrating Simultaneous Teleportation of Multiple Qumodes A team led by Xiaolong Su at Shanxi University in China now reports a way to do exactly that, with control built in. The researchers proposed and demonstrated controllable, deterministic continuous-variable quantum teleportation of multiple sideband qumodes simultaneously.

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