314 citations · 5.5k across the 106 of their papers we have counts for
8 papers · 1 filter
Temperature Dependent Performances of Superconducting Nanowire Single-Photon Detectors in an Ultralow-Temperature Region
Taro Yamashita, Shigehito Miki, Wei Qiu +3
We present the performances of a superconducting nanowire single-photon detector (SNSPD) in an ultralow-temperature region from 16 mK to 4 K. The system detection efficiency of the…
Photon level crosstalk between parallel fibers installed in urban area
Mikio Fujiwara, Shigehito Miki, Taro Yamashita +2
We estimate the channel characteristics of field-installed dark fibers at single photon levels for quantum key distribution (QKD). Measured fibers are telecom single-mode dark fibe…
Multi-channel SNSPD system with high detection efficiency at telecommunication wavelength
Shigehito Miki, Taro Yamashita, Mikio Fujiwara +2
We developed a four-channel superconducting nanowire single-photon detector system based on a Gifford-McMahon cryocooler. All channels showed a system detection efficiency (at a 10…
Invariance of the bit error rate in the ancilla-assisted homodyne detection
Yuhsuke Yoshida, Masahiro Takeoka, Masahide Sasaki
We investigated the minimum achievable bit error rate of discriminating binary coherent states by homodyne measurements with the help of arbitrary ancilla states coupled via beam s…
Compactly packaged superconducting nanowire single-photon detector with an optical cavity for multichannel system
Shigehito Miki, Masanori Takeda, Mikio Fujiwara +2
We developed superconducting nanowire single-photon detectors with an optical cavity (OC-SNSPDs) for multichannel systems. For efficient coupling, the devices were installed in com…
Performance of hybrid entanglement photon pair source for quantum key distribution
M. Fujiwara, M. Toyoshima, M. Sasaki +3
We report on the experimental demonstration of a source of hybrid entanglement pairs between two different degrees of freedom, a 1550 nm time-bin qubit and an 810 nm polarization q…