614 citations · 6k across the 120 of their papers we have counts for
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Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
Rikizo Ikuta, Toshiki Kobayashi, Tetsuo Kawakami +8
Quantum network with a current telecom photonic infrastructure is deficient in quantum storages that keep arbitrary quantum state in sufficient time duration for a long-distance qu…
Rigorous calibration method for photon-number statistics
Masahiro Kumazawa, Toshihiko Sasaki, Masato Koashi
Characterization of photon statistics of a light source is one of the most basic tools in quantum optics. Although the outcome from existing methods is believed to be a good approx…
Mach-Zehnder interferometer using frequency-domain beamsplitter
Toshiki Kobayashi, Daisuke Yamazaki, Kenichiro Matsuki +7
We demonstrated the first-order interference between coherent light at 1580 nm and 795 nm by using frequency-domain Mach-Zehnder interferometer (MZI). The MZI is implemented by two…
Efficient simulation of quantum error correction under coherent error based on non-unitary free-fermionic formalism
Yasunari Suzuki, Keisuke Fujii, Masato Koashi
In order to realize fault-tolerant quantum computation, tight evaluation of error threshold under practical noise models is essential. While non-Clifford noise is ubiquitous in exp…
A security proof of the round-robin differential phase shift quantum key distribution protocol based on the signal disturbance
Toshihiko Sasaki, Masato Koashi
The round-robin differential phase shift (RRDPS) quantum key distribution (QKD) protocol is a unique quantum key distribution protocol whose security has not been understood throug…
Finite-key analysis for quantum key distribution with weak coherent pulses based on Bernoulli sampling
Shun Kawakami, Toshihiko Sasaki, Masato Koashi
An essential step in quantum key distribution is the estimation of parameters related to the leaked amount of information, which is usually done by sampling of the communication da…