579 citations · 1.9k across the 31 of their papers we have counts for
32 papers
Negative entropy in scrambling black holes
Koji Azuma
We present a microscopic statistical-mechanical foundation for interpreting the horizon area of a scrambling black hole as coherent information, equivalently negative conditional q…
Networking quantum networks with minimum cost aggregation
Koji Azuma
A quantum internet holds promise for achieving distributed quantum sensing and large-scale quantum computer networks, as well as quantum communication among arbitrary clients all o…
Generation of a time-bin Greenberger--Horne--Zeilinger state with an optical switch
Hsin-Pin Lo, Takuya Ikuta, Koji Azuma +3
Multipartite entanglement is a critical resource in quantum information processing that exhibits much richer phenomenon and stronger correlations than in bipartite systems. This ad…
Verifiable homodyne measurement for detecting non-local properies of light
Go Kato, Kiyoshi Tamaki, Masaki Owari +1
The homodyne detection is one of the most basic tools for identifying the quantum state of light. It has been used to detect useful non-local properties, such as entanglement for t…
Quantum repeaters: From quantum networks to the quantum internet
Koji Azuma, Sophia E. Economou, David Elkouss +4
A quantum internet is the holy grail of quantum information processing, enabling the deployment of a broad range of quantum technologies and protocols on a global scale. However, n…
Optimal supplier of single-error-type entanglement via coherent-state transmission
Koji Azuma, Nobuyuki Imoto, Masato Koashi
Compared with entanglement with multiple types of noise, entanglement including only one type of error is a favorable fundamental resource not only for quantum communication but al…