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Jun Iichi Fujii

dblp:06/2941 · also Jun Ichi Fujii · DBLP profile ↗
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2ranked-venue papers
2as first author
0since 2021 · last 2006
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Theory of computation · 1 · 1 first-authorApplied, interdisciplinary, general and emerging computing · 1 · 1 first-author

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Theoretical computer science
1 paper
Coding theory · 67% Quantum computing and quantum information · 33%

Topics — the 3 heaviest of 3, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Coding theory
channel coding		 0.112006
Concavity of the Auxiliary Function Appearing in Quantum Reliability Function · IEEE Trans. Inf. Theory 2006
Quantum computing and quantum information › quantum error correction
quantum code		 0.112006
Concavity of the Auxiliary Function Appearing in Quantum Reliability Function · IEEE Trans. Inf. Theory 2006
Coding theory › channel coding › error probability bounds
random coding bound		 0.112006
Concavity of the Auxiliary Function Appearing in Quantum Reliability Function · IEEE Trans. Inf. Theory 2006

Methods — techniques the papers use, named apart from their topics

concavity proof · 0.1auxiliary function analysis · 0.1
YearPublicationVenuePosition
2006 Concavity of the Auxiliary Function Appearing in Quantum Reliability Function
abstract
Reliability functions characterize the asymptotic behavior of the error probability for transmission of data on a channel. Holevo introduced the quantum channel, and gave an expression for a random-coding lower bound involving an auxiliary function. Holevo, Ogawa, and Nagaoka conjectured that this auxiliary function is concave. Here we give a proof of this conjecture.
Jun Iichi Fujii, Ritsuo Nakamoto, Kenjiro Yanagi
 IEEE Trans. Inf. Theory1
2005 Remarks on concavity of the auxiliary function appearing in quantum reliability function in classical-quantum channels
abstract
This is an extension of results represented in ISIT2003. Concavity of the auxiliary function which appears in the random coding exponent as the lower bound of the quantum reliability function for general quantum states is proven for 0 /spl les/ s /spl les/ 1.
Jun Iichi Fujii, Ritsuo Nakamoto, Kenjiro Yanagi
 ISIT1