Information flow in entangled quantum systems
Abstract
All information in quantum systems is, notwithstanding Bell's theorem, localised. Measuring or otherwise interacting with a quantum system S has no effect on distant systems from which S is dynamically isolated, even if they are entangled with S. Using the Heisenberg picture to analyse quantum information processing makes this locality explicit, and reveals that under some circumstances (in particular, in EinsteinPodolskiRosen experiments and in quantum teleportation) quantum information is transmitted through 'classical' (i.e. decoherent) information channels.
 Publication:

Proceedings of the Royal Society of London Series A
 Pub Date:
 July 2000
 DOI:
 10.1098/rspa.2000.0585
 arXiv:
 arXiv:quantph/9906007
 Bibcode:
 2000RSPSA.456.1759D
 Keywords:

 Quantum Physics
 EPrint:
 PostScript version now available: http://www.qubit.org/people/patrickh/Papers/InformationFlow.ps