H
Hiroshi Nagaoka
Researcher at University of Electro-Communications
Publications - 46
Citations - 4816
Hiroshi Nagaoka is an academic researcher from University of Electro-Communications. The author has contributed to research in topics: Quantum channel & Classical capacity. The author has an hindex of 21, co-authored 45 publications receiving 4466 citations.
Papers
More filters
Journal ArticleDOI
Logical reversibility in quantum measurement: General theory and specific examples
TL;DR: A measurement process is logically reversible if the premeasurement density operator of the measured system is uniquely determined from the postmeasurements density operator and the outcome of the measurement.
Proceedings ArticleDOI
Algorithms of Arimoto-Blahut type for computing quantum channel capacity
TL;DR: In the Arimoto-Blahut algorithm for computing the capacity of a classical discrete memoryless channel, maximization of the mutual information is converted to more tractable alternating maximizations of a two-variable function.
Journal Article
Numerical Experiments on The Capacity of Quantum Channel with Entangled Input States
Susumu Osawa,Hiroshi Nagaoka +1 more
TL;DR: In this article, the capacity of the product quantum channel with product input states was investigated and it was shown that the additivity of the channel always holds and that entangled input states cannot enhance the channel capacity.
Journal ArticleDOI
Huffman coding with an infinite alphabet
TL;DR: Two new concepts of the optimality of a prefix D-ary code are introduced, which are shown to be equivalent to that defined in the traditional way for the case where the Shannon entropy H(P) diverges.
Book ChapterDOI
Strong Converse and Stein's Lemma in Quantum Hypothesis Testing
Tomohiro Ogawa,Hiroshi Nagaoka +1 more
TL;DR: In this paper, a new inequality between the errors of the first kind and the second kind was shown, which complements the result of Hiai and Petz (1991) to establish the quantum version of Stein's lemma.