Quantum Algorithms Database
Quantum Teleportation Protocol
A protocol for transferring an unknown quantum state from one location to another using entanglement and classical communication.
Year
1993
Inventor(s)
Bennett, Brassard, Crépeau, Jozsa, Peres & Wootters
Speedup Type
No Speedup Claimed
Difficulty
★★★☆☆
The Problem
Moving a fragile, unknown quantum state to a distant location without physically transporting the particle itself.
How It Works
Uses a pre-shared entangled pair plus a measurement and classical message to reconstruct the original quantum state at the destination, destroying the original in the process (consistent with the no-cloning theorem).
Real-World Impact
Foundational to quantum networking and the long-term vision of a quantum internet; experimentally demonstrated over increasing distances, including via satellite.