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Quantum superadditivity in linear optics networks: Sending bits via multiple-access Gaussian channels

Quantum superadditivity in linear optics networks: Sending bits via multiple-access Gaussian channels,10.1103/PhysRevA.82.020302,Physical Review A,Ł.

Quantum superadditivity in linear optics networks: Sending bits via multiple-access Gaussian channels   (Citations: 1)
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We study classical capacity regions of quantum Gaussian multiple access channels (MAC). In classical variants of such channels, whilst some capacity superadditivity-type effects such as the so called {\it water filling effect} may be achieved, a fundamental classical additivity law can still be identified, {\it viz.} adding resources to one sender is never advantageous to other senders in sending their respective information to the receiver. Here, we show that quantum resources allows violation of this law, by providing two illustrative schemes of experimentally feasible Gaussian MACs.
Journal: Physical Review A - PHYS REV A , vol. 82, no. 2, 2010
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