Teleportation Revealed

TL;DR

This paper revisits the Deutsch-Hayden approach to quantum teleportation, providing a local and complete explanation that demystifies how quantum information is transmitted using entanglement and classical communication.

Contribution

The paper re-exposes and further develops the Deutsch-Hayden local explanation of quantum teleportation using the Heisenberg picture.

Findings

Heisenberg picture offers a local and complete description of quantum systems.

Deutsch and Hayden's analysis reveals the true nature of quantum teleportation.

The local account clarifies how quantum information transfer occurs without nonlocal effects.

Abstract

Quantum teleportation is the name of a problem: how can the real-valued parameters encoding the state at Alice's location make their way to Bob's location via shared entanglement and only two bits of classical communication? Without an explanation, teleportation appears to be a conjuring trick. Investigating the phenomenon with Schr\"odinger states and reduced density matrices shall always leave loose ends because they are not local and complete descriptions of quantum systems. Upon demonstrating that the Heisenberg picture admits a local and complete description, Deutsch and Hayden rendered its explanatory power manifest by revealing the trick behind teleportation, namely, by providing an entirely local account. Their analysis is re-exposed and further developed.