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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| QIT (2nd) |
2024-05-28 13:00 |
Ibaraki | AIST Tsukuba (Ibaraki) | [Poster Presentation]
The effect of digital signal processing on excess noise in continuous variable quantum key distribution Shinya Sano, Takuya Hirano (Gakushuin Univ.) |
In continuous variable quantum key distribution (CV-QKD), the sender transmits weak laser light after applying quadratur... [more] | |
| QIT (2nd) |
2023-12-17 17:30 |
Okinawa | OIST (Okinawa, Online) (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Low-noise balanced detector with > 10 dB noise clearance at 7 GHz Sakurako Seino, Miwa Naka, Takuya Hirano (Gakushuin Univ.) |
Homodyne detection is widely used as a means of measuring the quadrature-phase amplitude of light, and in order to speed... [more] | |
| QIT (2nd) |
2022-12-08 14:00 |
Kanagawa | Keio Univ. (Kanagawa, Online) (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Quantum Noise Measurements with a GHz-Bandwidth Low-Noise Balanced Detector Sakurako Seino, Takuya Hirano (Gakushuin Univ.) |
Homodyne detection is widely used as a means of measuring the quadrature-phase amplitude of light, and a broadband balan... [more] | |
| QIT (2nd) |
2022-05-30 13:30 |
Online | Online (Online) | [Poster Presentation]
Experimental demonstration of a local homodyne measurement Arora Devanshi (Shizuoka Univ.), Go Kato (NICT), Takuya Hirano (Gakushuin Univ.), Masaki Owari (Shizuoka Univ.) |
Balanced homodyne detection is an essential tool to realize continuous variable (CV) quantum communication protocols. A ... [more] | |
| QIT (2nd) |
2019-11-18 13:50 |
Tokyo | Gakushuin University (Tokyo) | [Poster Presentation]
Development of a high-performance BEC spatial magnetometer toward the quantum enhanced measurement Kosuke Shibata, Naota Sekiguchi, Aki Torii, Ryohei Kuramoto, Daiki Fukuda, Takuya Hirano (Gakusuin Univ.) |
[more] | |
| QIT (2nd) |
2019-05-20 13:20 |
Fukuoka | Kyushu University, Chikushi Campus (Fukuoka) | [Poster Presentation]
Reduction of size and excess noise of continuous-variable quantum key distribution system using single-path interferometer Shinya Hirashita, Kento Kitamura, Takuya Hirano (Gakushuin Univ.) |
It is necessary to reduce excess noise in order to realize continuous quantum key distribution (CV- QKD) in a channel wi... [more] | |
| QIT (2nd) |
2018-06-04 13:20 |
Hiroshima | ICCH Ran (Hiroshima) | [Poster Presentation]
Time-domain measurement of continuous-variable entanglement using temporally shaped local oscillator pulses Ami Shinjo (Gakushuin Univ.), Yujiro Eto (AIST), Takuya Katayama, Takuya Hirano (Gakushuin Univ.) |
We report the time domain measurement of continuous variable entanglement using a pulsed light source and waveguides. In... [more] | |
| QIT (2nd) |
2017-05-29 15:00 |
Kyoto | Ritesumeikan University, Suzaku Campus (Kyoto) | [Poster Presentation]
Time-domain measurement of continuous-variable entanglement using shaped picosecond pulsed light Ami Shinjo (Gakushuin Univ.), Yujiro Eto (AIST), Takuya Hirano (Gakushuin Univ.) |
We report on the time-domain measurement of continuous-variable entanglement with pulsed light source and waveguides. Th... [more] | |
| QIT (2nd) |
2015-11-24 12:20 |
Kanagawa | NTT Atsugi R&D center (Kanagawa) | Direct observation of pulsed EPR entanglement measured by shaped local oscillators Ami Shinjo, Sachi Kikuchi, Yujiro Eto, Takuya Hirano (Gakushuin Univ.) |
The strong entanglement correlation that satisfies Einstein-Podolsky-Rosen (EPR) criterion seemingly violates the Heise... [more] | |
| QIT (2nd) |
2015-11-24 13:40 |
Kanagawa | NTT Atsugi R&D center (Kanagawa) | [Poster Presentation]
Generation of physical random numbers by using homodyne detection Kodai Hirakawa, Yusuke Oguri, Kaori Kono, Shota Oya, Takumi Nakano, Tsubasa Ichikawa, Takuya Hirano (Gakushuin Univ.), Toyohiro Tsurumaru (Mitsubishi Electric) |
Physical random numbers generated by using quantum measurement are in principle impossible to predict.We have demonstra... [more] | |
| QIT (2nd) |
2015-05-25 13:20 |
Osaka | Osaka University (Osaka) | [Poster Presentation]
Demonstration of pulsed EPR entanglement measured by shaped local oscillators Ami Shinjo, Naoyuki Hashiyama, Yujiro Eto, Takuya Hirano (Gakushuin Univ.) |
[more] | |
| COMP | 2014-12-05 14:55 |
Kumamoto | Sojo University (Kumamoto) | On a Gathering Protocol for Five Fat Robots Takuya Hirano, Yoshiaki Katayama (NITech), Koichi Wada (HOSEI Univ.)  COMP2014-37 |
In this paper, we propose a protocol for gathering problem with five mobile fat robots. Robots are anonymous, have no co... [more] | COMP2014-37 pp.29-36 |
| QIT (2nd) |
2014-11-17 13:30 |
Miyagi | Tohoku Univ. (Miyagi) | [Poster Presentation]
Continuos Variable Quantum Key Distribution system for high-speed operation Yusuke Oguri, Vanou Ishii, Takuto Matsubara, Tsubasa Ichikawa, Takuya Hirano (Gakushuin Univ.), Kenta Kasai, Ryutaroh Matsumoto (Tokyo Tech.), Toyohiro Tsurumaru (Mitsubishi Electric) |
We report an experimental implementation of a continuous variable quantum key distribution (CV-QKD) protocol with discre... [more] | |
| QIT (2nd) |
2014-05-12 17:50 |
Aichi | Nagoya Univ. (Aichi) | Excess noise and transmittance in continuous variable quantum key distribution with discrete modulations Tsubasa Ichikawa, Yasufumi Koike, Vanou Ishii, Takuya Hirano (Gakushuin Univ.) |
[more] | |
| QIT (2nd) |
2012-11-27 - 2012-11-28 |
Kanagawa | Keio Univ. Hiyoshi Campus (Kanagawa) | [Poster Presentation]
Ramsey type interferometer in spinor Bose-Einstein condensate Hirosuke Suzuki, Sawako Sekine, Yasuhi Tomiyama, Sho Hasegawa, Yujiro Eto, Mark Sadgrove, Takuya Hirano (Gakushuin Univ.) |
We realize a Ramsey-type interferometer by applying coherent rotations to a spin-2 Bose-Einstein con- densate. The obtai... [more] | |
| QIT (2nd) |
2012-11-27 - 2012-11-28 |
Kanagawa | Keio Univ. Hiyoshi Campus (Kanagawa) | [Poster Presentation]
On the Key Rate of Continuous Variable Quantum Key Distribution with Discrete Modulations under Entangling Cloner Attacks Tsubasa Ichikawa, Kazuhiro Murayama, Takuya Hirano (Gakushuin Univ.) |
We present a security analysis of a continuous-variable quantum key distribution protocol with discrete modulations, ass... [more] | |
| SANE | 2009-11-03 15:25 |
Overseas | Fudan University (Shanghai) (Overseas) | Verification Field Test of the Microwave Emission due to Rock Crash
-- Its Background and Obtained Results -- Tadashi Takano (JAXA/Nihon Univ), Takashi Maeda, Yoji Miki, Sayo Akatsuka (JAXA), Shingo Yoshida (Univ. of Tokyo), Kohei Nagata (Univ of Tokyo), Katsumi Hattori, Masahide Nishihashi, Daishi Kaida, Takuya Hirano (Chiba Univ) SANE2009-122 |
rowave emission due to rock fracture was found in the experiments in our laboratory. Rock fractures are expected to be a... [more] | SANE2009-122 pp.223-228 |
| SAT | 2006-02-17 15:40 |
Ishikawa | Kanazawa Institute of Technology (Ishikawa) | Development Results of a Proto Flight Model of the Ka-band Active Phased Array Antenna for WINDS Takuya Hirano, Sumire Takatsu, Shiro Kitao, Kuniaki Shiramatsu (MITSUBISHI Electric Co.), Masanobu Yajima (JAXA) |
[more] | SAT2005-59 pp.55-60 |
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