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Quantum superadditivity in linear optics networks: Sending bits via multiple-access Gaussian channels
Abstract
Superadditivity effects of communication capacities are known in the case of discrete variable quantum channels. We describe the continuous variable analog of one of these effects in the framework of Gaussian multiple access channels (MACs). Classically, superadditivity-type effects are strongly restricted: For example, adding resources to one sender is never advantageous to other senders in sending their respective information to the receiver. We show that this rule can be surpassed using quantum resources, giving rise to a type of truly quantum superadditivity. This is illustrated here for two examples of experimentally feasible Gaussian MACs.
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- Copyright (2010 American Physical Society)
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
PHYSICAL REVIEW A
no. 82,
pages 203021 - 4,
ISSN: 2469-9926 - Language:
- English
- Publication year:
- 2010
- Bibliographic description:
- Czekaj Ł., Korbicz J., Chhajlany R., Horodecki P.: Quantum superadditivity in linear optics networks: Sending bits via multiple-access Gaussian channels// PHYSICAL REVIEW A. -Vol. 82, nr. Iss. 2 (2010), s.203021-4
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- Gdańsk University of Technology
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