Experimental proposal for achieving superadditive communication capacities with a binary quantum alphabet
Abstract
We demonstrate superadditivity in the communication capacity of a binary alphabet consisting of two nonorthogonal quantum states. For this scheme, collective decoding is performed two transmissions at a time. This improves upon the previous schemes of Sasaki et al. [Phys. Rev. A 58, 146 (1998)] where superadditivity was not achieved until a decoding of three or more transmissions at a time. This places superadditivity within the regime of a near-term laboratory demonstration. We propose an experimental test based upon an alphabet of low photon-number coherent states where the signal decoding is done with atomic state measurements on a single atom in a high-finesse optical cavity.
- Publication:
-
Physical Review A
- Pub Date:
- March 2000
- DOI:
- 10.1103/PhysRevA.61.032309
- arXiv:
- arXiv:quant-ph/9903039
- Bibcode:
- 2000PhRvA..61c2309B
- Keywords:
-
- 03.67.Hk;
- 32.80.-t;
- 42.50.-p;
- Quantum communication;
- Photon interactions with atoms;
- Quantum optics;
- Quantum Physics
- E-Print:
- 7 pages, 5 figures