202 citations · 728 across the 23 of their papers we have counts for
7 papers · 1 filter
Secret key rate of a continuous-variable quantum-key-distribution scheme when the detection process is inaccessible to eavesdroppers
Ryo Namiki, Akira Kitagawa, Takuya Hirano
We have developed a method to calculate a secret key rate of a continuous-variable quantum-key-distribution scheme using four coherent states and postselection for a general model…
Coexistence of Continuous Variable Quantum Key Distribution and 7 12.5 Gbit/s Classical Channels
Tobias A. Eriksson, Takuya Hirano, Motoharu Ono +6
We study coexistence of CV-QKD and 7 classical 12.5 Gbit/s on-off keying channels in WDM transmission over the C-band. We demonstrate key generation with a distilled secret key rat…
Ramsey interferometry using the Zeeman sublevels in a spin-2 Bose gas
M. Sadgrove, Y. Eto, S. Sekine +2
We perform atom interferometry using the Zeeman sublevels of a spin-2 Bose-Einstein condensate of Rb. The observed fringes are strongly peaked, and fringe repetition rates h…
Efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection
Ryo Namiki, Takuya Hirano
We propose efficient-phase-encoding protocols for continuous-variable quantum key distribution using coherent states and postselection. By these phase encodings, the probability of…
Security of Continuous-variable quantum cryptography using coherent states: Decline of postselection advantage
Ryo Namiki, Takuya Hirano
We investigate the security of continuous-variable (CV) quantum key distribution (QKD) using coherent states in the presence of quadrature excess noise. We consider an eavesdroppin…
A practical limitation for continuous-variable quantum cryptography using coherent states
Ryo Namiki, Takuya Hirano
In this letter, first, we investigate the security of a continuous-variable quantum cryptographic scheme with a postselection process against individual beam splitting attack. It i…