3 citations · 3 across the 2 of their papers we have counts for
5 papers · 1 filter
Reply to comment on Y-00 quantum secure communication protocol
Osamu Hirota
In 2000, an attractive new quantum cryptography was discovered by H.P.Yuen, which can realize secure communication with high speeds and at long distance by conventional optical dev…
Experimental study for Yuen-Kim protocol of quantum key distribution with unconditional secure
O. Hirota, K. Kato, M. Sohma
In this report, we simulate practical feature of Yuen-Kim protocol for quantum key distribution with unconditional secure. In order to demonstrate them experimentally by intensity…
Information capacity formula of quantum optical channels
Masaki Sohma, Osamu Hirota
The applications of the general formulae of channel capacity developed in the quantum information theory to evaluation of information transmission capacity of optical channel are i…
Entangled Nonorthogonal States and Their Decoherence Properties
Osamu Hirota, Steven J. van Enk, Kazuo Nakamura +2
This paper presents properties of the so-called quasi-Bell states: entangled states written as superpositions of nonorthogonal states. It is shown that a special class of those sta…
Entangled state based on nonorthogonal state
Osamu Hirota, Masahide Sasaki
Properties of entangled states based on nonorthogonal states are clarified. Especially, it is shown that they can have complete degree of entanglement.