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Loss-tolerant quantum cryptography with imperfect sources
Kiyoshi Tamaki, Marcos Curty, Go Kato +2
In principle, quantum key distribution (QKD) offers unconditional security based on the laws of physics. In practice, flaws in the state preparation undermine the security of QKD s…
All photonic quantum repeaters
Koji Azuma, Kiyoshi Tamaki, Hoi-Kwong Lo
Quantum communication holds promise for unconditionally secure transmission of secret messages and faithful transfer of unknown quantum states. Photons appear to be the medium of c…
Does "quantum nonlocality without entanglement" have quantum origin?
Masato Koashi, Koji Azuma, Shinya Nakamura +1
Quantum separable operations are defined as those that cannot produce entanglement from separable states, and it is known that they strictly surpass local operations and classical…