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

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.020302· OSTI ID:21448410

Czekaj, L; Horodecki, P ^[1]; Korbicz, J K ^[1]; Chhajlany, R W ^[1]

---

1. Faculty of Applied Physics and Mathematics, Gdansk University of Technology, PL-80-952 Gdansk (Poland)

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.

• OSTI ID: 21448410
• Journal Information: Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.020302; (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
DATA TRANSMISSION
OPTICS
QUANTUM MECHANICS
QUANTUM STATES
SUPERRADIANCE
COMMUNICATIONS
EMISSION
ENERGY-LEVEL TRANSITIONS
MECHANICS
PHOTON EMISSION
STIMULATED EMISSION