The ABC of Deutsch–Hayden Descriptors

  title={The ABC of Deutsch–Hayden Descriptors},
  author={Charles Alexandre B'edard},
  journal={Quantum Reports},
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… 
3 Citations

Figures and Tables from this paper

The cost of quantum locality
The number of degrees of freedom of a single qubit’s local description is shown to grow exponentially with the total number of qubits considered as a global system, and structures that supplement the universal wave function are investigated.
Local Quantum Theory with Fluids in Space-Time
In 1948, Schwinger developed a local Lorentz covariant formulation of relativistic quantum electrodynamics in space-time which is fundamentally inconsistent with any delocalized interpretation of
A local-realistic theory for fermions
By following the rigorous use of the parity superselection rule for fermions, it is shown how this construction removes the usual difficulties that fermionic systems display in regard to the definition of local states and local transformations.


The Heisenberg Representation of Quantum Computers
Since Shor`s discovery of an algorithm to factor numbers on a quantum computer in polynomial time, quantum computation has become a subject of immense interest. Unfortunately, one of the key features
Parallel Lives: A Local-Realistic Interpretation of “Nonlocal” Boxes
Along the way, the celebrated 1935 argument of Einstein, Podolsky and Rosen is reinterpreted, and it is concluded that they were right in their questioning the completeness of the Copenhagen version of quantum theory, provided one believes in a local-realistic universe.
On the Einstein-Podolsky-Rosen paradox
THE paradox of Einstein, Podolsky and Rosen [1] was advanced as an argument that quantum mechanics could not be a complete theory but should be supplemented by additional variables. These additional
Information flow in entangled quantum systems
  • D. Deutsch, P. Hayden
  • Physics
    Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
  • 2000
All information in quantum systems is, notwithstanding Bell's theorem, localized. Measuring or otherwise interacting with a quantum system S has no effect on distant systems from which S is
Experimental Realization of Einstein-Podolsky-Rosen-Bohm Gedankenexperiment : A New Violation of Bell's Inequalities
The linear-polarization correlation of pairs of photons emitted in a radiative cascade of calcium has been measured. The new experimental scheme, using two-channel polarizers (i.e., optical analogs
Communication via one- and two-particle operators on Einstein-Podolsky-Rosen states.
The set of states accessible from an initial EPR state by one-particle operations are characterized and it is shown that in a sense they allow two bits to be encoded reliably in one spin-1/2 particle.
Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels.
An unknown quantum state \ensuremath{\Vert}\ensuremath{\varphi}〉 can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical Einstein-Podolsky-Rosen
Albert Einstein: Philosopher-Scientist
Written by the man considered the "Person of the Century" by Time magazine, this is not a glimpse into Einstein's personal life, but an extension and elaboration into his thinking on science. Two of
Quantum computational networks
  • D. Deutsch
  • Physics, Computer Science
    Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences
  • 1989
The theory of quantum computational networks is the quantum generalization of the theory of logic circuits used in classical computing machines, and a single type of gate, the universal quantum gate, together with quantum ‘unit wires' is adequate for constructing networks with any possible quantum computational property.
Parallel lives: A localrealistic interpretation of “nonlocal
  • boxes. Entropy,
  • 2019