394 citations · 1.5k across the 19 of their papers we have counts for
19 papers
A problem of existence of bound entangled states with non-positive partial transpose and the Hilbert's 17th problem
Tohya Hiroshima
It is found that the problem of existence of bound entangled states with non-positive partial transpose (NPPT) has the intriguing relation to the Hilbert's 17th problem. More preci…
Quantum teleportation scheme by selecting one of multiple output ports
Satoshi Ishizaka, Tohya Hiroshima
The scheme of quantum teleportation, where Bob has multiple (N) output ports and obtains the teleported state by simply selecting one of the N ports, is thoroughly studied. We cons…
Asymptotic teleportation scheme as a universal programmable quantum processor
Satoshi Ishizaka, Tohya Hiroshima
We consider a scheme of quantum teleportation where a receiver has multiple (N) output ports and obtains the teleported state by merely selecting one of the N ports according to th…
Bound entangled states with non-positive partial transpose exist
Tohya Hiroshima
This paper has been withdrawn by the author, due a crucial error in the optimization. For the last one month I have been trying to remove the error, but it seems to take a lot of t…
Quantum information with Gaussian states
X. -B. Wang, T. Hiroshima, A. Tomita +1
Quantum optical Gaussian states are a type of important robust quantum states which are manipulatable by the existing technologies. So far, most of the important quantum informatio…
Security analysis of decoy state quantum key distribution incorporating finite statistics
Jun Hasegawa, Masahito Hayashi, Tohya Hiroshima +1
Decoy state method quantum key distribution (QKD) is one of the promising practical solutions to BB84 QKD with coherent light pulses. In the real world, however, statistical fluctu…