394 citations · 1.5k across the 42 of their papers we have counts for
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Single-photon interference over 150-km transmission using silica-based integrated-optic interferometers for quantum cryptography
Tadamasa Kimura, Yoshihiro Nambu, Takaaki Hatanaka +3
We have demonstrated single-photon interference over 150 km using time-division interferometers for quantum cryptography, which were composed of two integrated-optic asymmetric Mac…
Antinormally Ordered Photodetection of Continuous-mode Field
Koji Usami, Akihisa Tomita, Kazuo Nakamura
When the electromagnetic field is detected by stimulated emission, rather than by absorption, antinormally ordered photodetection can be realized. One of the distinct features of t…
Observation of Antinormally Ordered Hanbury-Brown--Twiss Correlations
Koji Usami, Yoshihiro Nambu, Bao-Sen Shi +2
We have measured antinormally ordered Hanbury-Brown--Twiss correlations for coherent states of electromagnetic field by using stimulated parametric down-conversion process. Photons…
Measured Quantum Fourier Transform of 1024 Qubits on Fiber Optics
Akihisa Tomita, Kazuo Nakamura
Quantum Fourier transform (QFT) is a key function to realize quantum computers. A QFT followed by measurement was demonstrated on a simple circuit based on fiber-optics. The QFT wa…