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Phys. Rev. A 70, 012307 (2004) [6 pages]

Capacity of nonlinear bosonic systems

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Vittorio Giovannetti1,*, Seth Lloyd1,2, and Lorenzo Maccone1,†
1Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue,Cambridge, Massachusetts 02139, USA
2Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue,Cambridge, Massachusetts 02139, USA

Received 29 January 2004; published 13 July 2004

We analyze the role of nonlinear Hamiltonians in bosonic channels. We show that the information capacity as a function of the channel energy is increased with respect to the corresponding linear case, although only when the energy used for driving the nonlinearity is not considered as part of the energetic cost and when dispersive effects are negligible.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.012307
DOI:
10.1103/PhysRevA.70.012307
PACS:
03.67.−a, 42.50.−p, 42.65.−k, 89.70.+c

*Present address: NEST-INFM and Scuola Normal Superiore, piazza dei Cavalieri 7, I-56126 Pisa, Italy.

†Present address: QUIT, Quantum Information Theory Group, Dipartimento di Fisica “A.Volta,” Università di Pavia, via A. Bassi 6, I-27100, Pavia Italy.

 
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