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Title: Implementation of generalized quantum measurements: Superadditive quantum coding, accessible information extraction, and classical capacity limit

Abstract

Quantum-information theory predicts that when the transmission resource is doubled in quantum channels, the amount of information transmitted can be increased more than twice by quantum-channel coding technique, whereas the increase is at most twice in classical information theory. This remarkable feature, the superadditive quantum-coding gain, can be implemented by appropriate choices of code words and corresponding quantum decoding which requires a collective quantum measurement. Recently, an experimental demonstration was reported [M. Fujiwara et al., Phys. Rev. Lett. 90, 167906 (2003)]. The purpose of this paper is to describe our experiment in detail. Particularly, a design strategy of quantum-collective decoding in physical quantum circuits is emphasized. We also address the practical implication of the gain on communication performance by introducing the quantum-classical hybrid coding scheme. We show how the superadditive quantum-coding gain, even in a small code length, can boost the communication performance of conventional coding techniques.

Authors:
; ; ;  [1]
  1. National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795 (Japan)
Publication Date:
OSTI Identifier:
20641142
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 69; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.69.052329; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CAPACITY; CORRELATIONS; DATA TRANSMISSION; ENERGY LEVELS; GAIN; INFORMATION; INFORMATION THEORY; PERFORMANCE; QUANTUM MECHANICS; SECRECY PROTECTION

Citation Formats

Takeoka, Masahiro, Fujiwara, Mikio, Mizuno, Jun, Sasaki, Masahide, and CREST, Japan Science and Technology Corporation, Shibuya, Tokyo 150-0002. Implementation of generalized quantum measurements: Superadditive quantum coding, accessible information extraction, and classical capacity limit. United States: N. p., 2004. Web. doi:10.1103/PhysRevA.69.052329.
Takeoka, Masahiro, Fujiwara, Mikio, Mizuno, Jun, Sasaki, Masahide, & CREST, Japan Science and Technology Corporation, Shibuya, Tokyo 150-0002. Implementation of generalized quantum measurements: Superadditive quantum coding, accessible information extraction, and classical capacity limit. United States. https://doi.org/10.1103/PhysRevA.69.052329
Takeoka, Masahiro, Fujiwara, Mikio, Mizuno, Jun, Sasaki, Masahide, and CREST, Japan Science and Technology Corporation, Shibuya, Tokyo 150-0002. 2004. "Implementation of generalized quantum measurements: Superadditive quantum coding, accessible information extraction, and classical capacity limit". United States. https://doi.org/10.1103/PhysRevA.69.052329.
@article{osti_20641142,
title = {Implementation of generalized quantum measurements: Superadditive quantum coding, accessible information extraction, and classical capacity limit},
author = {Takeoka, Masahiro and Fujiwara, Mikio and Mizuno, Jun and Sasaki, Masahide and CREST, Japan Science and Technology Corporation, Shibuya, Tokyo 150-0002},
abstractNote = {Quantum-information theory predicts that when the transmission resource is doubled in quantum channels, the amount of information transmitted can be increased more than twice by quantum-channel coding technique, whereas the increase is at most twice in classical information theory. This remarkable feature, the superadditive quantum-coding gain, can be implemented by appropriate choices of code words and corresponding quantum decoding which requires a collective quantum measurement. Recently, an experimental demonstration was reported [M. Fujiwara et al., Phys. Rev. Lett. 90, 167906 (2003)]. The purpose of this paper is to describe our experiment in detail. Particularly, a design strategy of quantum-collective decoding in physical quantum circuits is emphasized. We also address the practical implication of the gain on communication performance by introducing the quantum-classical hybrid coding scheme. We show how the superadditive quantum-coding gain, even in a small code length, can boost the communication performance of conventional coding techniques.},
doi = {10.1103/PhysRevA.69.052329},
url = {https://www.osti.gov/biblio/20641142}, journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 69,
place = {United States},
year = {Sat May 01 00:00:00 EDT 2004},
month = {Sat May 01 00:00:00 EDT 2004}
}