Quantum Teleportation with PennyLane

Quantum Teleportation with PennyLane

This PennyLane demo implements quantum teleportation, the foundational protocol that transfers an unknown quantum state from a sender to a receiver using only a shared entangled pair and two classical bits, without physically moving the qubit and without learning the state. It is a cornerstone of quantum communication and a building block for distributed quantum computing and gate teleportation in fault-tolerant architectures. The tutorial builds the protocol step by step in PennyLane: preparing the unknown message state, creating a Bell pair shared between the two parties, entangling the message qubit with the sender's half of the pair and measuring both, and then, conditioned on those mid-circuit measurement outcomes, applying the appropriate Pauli corrections to the receiver's qubit so it becomes an exact copy of the original. It uses PennyLane's mid-circuit measurement and classical-conditioning features to express the measure-and-correct logic, and verifies that the receiver's final state matches the message. By making the protocol concrete with modern dynamic-circuit primitives, the demo is a clear, end-to-end illustration of entanglement as a communication resource in PennyLane.

Run it

pip install -r requirements.txt
python demo.py

Source and license

Imported from demonstrations_v2/tutorial_teleportation/demo.py in PennyLaneAI/demos at c52c0abeb5122218aa96b38eea848864cce7323f, under the Apache License 2.0. Original authors: Xanadu and the PennyLane community. The upstream LICENSE is included alongside this example.