It has been more than 20 years since Deutsch and Hayden proved the locality of quantum theory, using the Heisenberg picture of quantum computational networks. Of course, locality holds even in the face of entanglement and Bell's theorem. Today, most researchers in quantum foundations are still convinced not only that a local description of quantum systems has not yet been provided, but that it cannot exist. The main goal of this paper is to address this misconception by re-explaining the descriptor formalism in a hopefully accessible and self-contained way. It is a step-by-step guide to how and why descriptors work. Finally, superdense coding is revisited in the light of descriptors.
- Pub Date:
- December 2020
- Quantum Physics
- 18 pages. arXiv admin note: substantial text overlap with arXiv:2001.09646. Response to arXiv admin note: Yes, arXiv:2001.09646 is splitting. I will soon update it to remove the overlap with this paper