Universal cloning of continuous quantum variables

Preprint

13 October 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.quant-ph/9909037

Abstract

The cloning of quantum variables with continuous spectra is analyzed. A universal - or Gaussian - quantum cloning machine is exhibited that copies equally well the states of two conjugate variables such as position and momentum. It also duplicates all coherent states with a fidelity of 2/3. More generally, the copies are shown to obey a no-cloning Heisenberg-like uncertainty relation.

Keywords

CONTINUOUS QUANTUM
QUANTUM VARIABLES
UNIVERSAL CLONING
COHERENT STATES
UNCERTAINTY
NO CLONING
VARIABLES

All Related Versions

Version 1, 1999-09-11, ArXiv
Version 2, 1999-10-13, ArXiv
Published version: Physical Review Letters, 85 (8), 1754.

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