Nonadditivity of quantum and classical capacities for entanglement breaking multiple-access channels and the butterfly network

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.060305· OSTI ID:21413172

Grudka, Andrzej ^[1]; Horodecki, Pawel ^[2]

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1. Faculty of Physics, Adam Mickiewicz University, PL-61-614 Poznan (Poland)
2. National Quantum Information Centre of Gdansk, PL-81-824 Sopot (Poland)

We analyze quantum network primitives which are entanglement breaking. We show superadditivity of quantum and classical capacity regions for quantum multiple-access channels and the quantum butterfly network. Since the effects are especially visible at high noise they suggest that quantum information effects may be particularly helpful in the case of the networks with occasional high noise rates. The present effects provide a qualitative borderline between superadditivities of bipartite and multipartite systems.

• OSTI ID: 21413172
• Journal Information: Physical Review. A, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevA.81.060305; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CAPACITY
NOISE
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION
QUANTUM MECHANICS
INFORMATION
MECHANICS