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Phys. Rev. Lett. 99, 240501 (2007) [4 pages]

Generalized No-Broadcasting Theorem

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Howard Barnum1,*, Jonathan Barrett2,†, Matthew Leifer2,3,‡, and Alexander Wilce4,§
1CCS-3: Information Sciences, MS B256, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
2Perimeter Institute for Theoretical Physics, 31 Caroline Street N, Waterloo, Ontario, Canada N2L 2Y5
3Institute for Quantum Computing, University of Waterloo, 200 University Avenue W., Waterloo, Ontario, Canada N2L 3G1
4Department of Mathematical Sciences, Susquehanna University, Selinsgrove, Pennsylvania 17870, USA

Received 26 February 2007; published 13 December 2007

We prove a generalized version of the no-broadcasting theorem, applicable to essentially any nonclassical finite-dimensional probabilistic model satisfying a no-signaling criterion, including ones with “superquantum” correlations. A strengthened version of the quantum no-broadcasting theorem follows, and its proof is significantly simpler than existing proofs of the no-broadcasting theorem.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.240501
DOI:
10.1103/PhysRevLett.99.240501
PACS:
03.67.Hk, 03.65.Ta, 03.65.Ud

*barnum@lanl.gov

†jbarrett@perimeterinstitute.ca

‡matt@mattleifer.info

§wilce@susqu.edu

 
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