| Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
QIT
(2nd) |
2023-12-17
17:30 |
Okinawa |
OIST
(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.
(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) |
2022-12-08
14:00 |
Kanagawa |
Keio Univ.
(Primary: On-site, Secondary: Online) |
[Poster Presentation]
Improvement of Squeezing using a Spatial Light Modulator controlled by Machine Learning
Amari Jorge (Gakushuin Univ.), Takai Junnosuke (Gakushuin Univ), Hirano Takuya (Gakushuin Univ.) |
Squeezed light is a key resource for many quantum information processing tasks. Among various methods for generating squ... [more] |
|
QIT
(2nd) |
2022-05-30
13:30 |
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 |
[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 |
[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 |
[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 |
[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 |
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 |
[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 |
[Poster Presentation]
Demonstration of pulsed EPR entanglement measured by shaped local oscillators
Ami Shinjo, Naoyuki Hashiyama, Yujiro Eto, Takuya Hirano (Gakushuin Univ.) |
[more] |
|
QIT
(2nd) |
2014-11-17
13:30 |
Miyagi |
Tohoku Univ. |
[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. |
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 |
[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 |
[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] |
|