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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 35  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
RECONF, VLD 2024-01-29
15:05
Kanagawa AIRBIC Meeting Room 1-4
(Primary: On-site, Secondary: Online)
A Study of Low Latency Feedback Operation Architecture for Superconducting Qubit
Takefumi Miyoshi (QuEL/e-trees), Keisuke Koike (e-trees), Kazuhisa Ogawa, Ryo Matsuda, Hidehisa Shiomi (Osaka Univ.), Shinichi Morisaka (Osaka Univ./QuEL), Yutaka Tabuchi (RIKEN), Makoto Negoro (Osaka Univ.) VLD2023-86 RECONF2023-89
 [more] VLD2023-86 RECONF2023-89
pp.35-40
QIT
(2nd)
2023-12-19
10:30
Okinawa OIST
(Primary: On-site, Secondary: Online)
Implementation of robustly optimized dynamical decoupling on superconducting qubits
Akinori Machino (Osaka Univ./QIQB), Kazuhisa Ogawa (QIQB), Kosuke Mitarai (Osaka Univ./QIQB), Takefumi Miyoshi (QIQB/e-trees/QuEL), Hidehisa Shiomi (QIQB), Shinichi Morisaka (QIQB/QuEL), Ryo Matsuda (Osaka Univ.), Keisuke Koike (e-trees), Ryutaro Ohira, Toshi Sumida, Yoshinori Kurimoto, Yuuya Sugita, Yosuke Ito (QuEL), Yasunari Suzuki (NTT), Peter A. Spring, Shiyu Wang, Shuhei Tamate, Yutaka Tabuchi (RIKEN), Yasunobu Nakamura (RIKEN/The univ. of Tokyo), Makoto Negoro (QIQB/QuEL)
Dynamical decoupling (DD) is one of the important techniques to protect the state of a qubit from decoherence, and plays... [more]
AP
(2nd)
2022-12-08
13:40
Okinawa
(Primary: On-site, Secondary: Online)
Development of Superconducting Qubit Controller
Hidehisa Shiomi (Osaka Univ.), Takefumi Miyoshi, Keisuke Koike (e-trees), Shinichi Morisaka (QuEL), Makoto Negoro (Osaka Univ.), Yosuke Ito (QuEL), Kazuhisa Ogawa (Osaka Univ.)
 [more]
QIT
(2nd)
2021-11-30
- 2021-12-01
Online Online [Poster Presentation] Analysis of the effects of the two-photon temporal distinguishability on measurement-device-independent quantum key distribution
Haobo Ge, Akihisa Tomita, Atsushi Okamoto (Hokkaido Univ.), Kazuhisa Ogawa (Osaka Univ.)
Measurement-device-independent quantum key distribution (MDI-QKD) protects the receiver from attacks against the measure... [more]
QIT
(2nd)
2021-12-01
09:00
Online Online Direct measurement of matrix elements of density-, process- and measurement-matrices using diagrammatic representation
Masaya Takahashi (Hokkaido Univ.), Kazuhisa Ogawa (Osaka Univ.), Akihisa Tomita (Hokkaido Univ.)
Quantum systems are characterized by density operators for the states, process operators for the time evolution, and POV... [more]
QIT
(2nd)
2021-11-30
13:30
Online Online [Poster Presentation] Analysis of the effects of the two-photon temporal distinguishability on measurement-device-independent quantum key distribution
Haobo Ge, Akihisa Tomita, Atsushi Okamoto (Hokkaido Univ.), Kazuhisa Ogawa (Osaka Univ.)
 [more]
OCS, CS
(Joint)
2021-01-15
13:00
Online Online Effect of spatial resolution of compensated wave front on performance in volume hologram demultiplexer
Hotaka Hayashi, Atsushi Okamoto (Hokkaido Univ.), Taketoshi Takahata (OPTOQUEST), Satoshi Shinada, Yuta Goto, Naoya Wada (NICT), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.) OCS2020-34
We are proposing volume hologram mode demultiplexer (VHDM) as a demultiplexer for mode division multiplex communication.... [more] OCS2020-34
pp.37-41
OCS, CS
(Joint)
2021-01-15
13:25
Online Online Experiment on joint switch of few-mode multi-core fiber using spatial light modulator
Yuta Abe, Atushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.), Daiki Soma, Noboru Yoshikane, Takehiro Tsuritani (KDDI Research, Inc.) OCS2020-35
In order to realize SDM transmission using few-mode multi-core fibers (FM-MCFs), a switching device adapted to spatially... [more] OCS2020-35
pp.42-45
QIT
(2nd)
2020-12-10
11:50
Online Online Direct measurement of ultrafast wave function of photons in the time domain
Kazuhisa Ogawa, Takumi Okazaki (Hokkaido Univ.), Hirokazu Kobayashi (Kochi Univ. Tech.), Toshihiro Nakanishi (Kyoto Univ.), Akihisa Tomita (Hokkaido Univ.)
The information encoding in the temporal mode of photons is important in quantum information processing in terms of larg... [more]
QIT
(2nd)
2020-12-11
17:50
Online Online Formulation and experimental demonstration of complex variance of observables in pre- and post-selected systems
Natsuki Abe, Kazuhisa Ogawa (Hokkaido Univ.), Hirokazu Kobayashi (Kochi Univ. of Tech.), Akihisa Tomita (Hokkaido Univ.)
In pre- and post-selected systems, information of observables can be obtained as weak values. Weak values in pre- and po... [more]
OFT, ITE-BCT, OCS, IEE-CMN [detail] 2020-11-12
16:25
Online Online Wave front compensation method for output signal in volume hologram demultiplexer
Hotaka Hayashi, Atsushi Okamoto (Hokkaido Univ.), Taketoshi Takahata (OPTOQUEST), Satoshi Shinada, Yuta Goto, Naoya Wada (NICT), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.) OCS2020-25
Volume Hologram mode De-Multiplexer (VHDM) using Volume Hologram (VH) is extremely cost effective because it can multipl... [more] OCS2020-25
pp.11-14
ITE-HI, IE, ITS, ITE-MMS, ITE-ME, ITE-AIT [detail] 2020-02-28
13:00
Hokkaido Hokkaido Univ.
(Cancelled but technical report was issued)
Influence of the distance between the observation plane and the focal plane on the resolution in tomographic imaging using VPC
Jiang Mengying, Atsushi Okamoto, Satosi Kawashima, Kazuhisa Ogawa, AkihisaTomita (Hokkaido Univ.)
 [more]
ITE-HI, IE, ITS, ITE-MMS, ITE-ME, ITE-AIT [detail] 2020-02-28
13:15
Hokkaido Hokkaido Univ.
(Cancelled but technical report was issued)
Numerical analysis of relationship between light utilization efficiency and modulation accuracy in complex amplitude modulation based on iterative spatial cross modulation
Tomohiro Maeda, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
 [more]
QIT
(2nd)
2019-11-18
13:50
Tokyo Gakushuin University [Poster Presentation] Analysis of the effects of the two-photon distinguishability on decoy state measurement-device-independent quantum key distribution
Haobo Ge, Akihisa Tomita, Kazuhisa Ogawa, Atsushi Okamoto (Hokkaido Univ.)
Measurement-device-independent quantum key distribution (MDI-QKD) protects the receiver from attacks against the measure... [more]
OCS, LQE, OPE 2019-10-18
14:30
Kagoshima   Improvement of Diffraction Efficiency of Mode Demultiplexer Using Volume Hologram at 1550 nm
Taijun Shiba, Atsushi Okamoto, Hotaka Hayashi, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.), Taketoshi Takahata (OPTOQUEST), Yuta Goto, Satoshi Shinada, Naoya Wada (NICT) OCS2019-47 OPE2019-85 LQE2019-63
To realize the mode division multiplexing transmission, we have proposed a volume holographic mode de-multiplexer (VHDM)... [more] OCS2019-47 OPE2019-85 LQE2019-63
pp.105-108
QIT
(2nd)
2019-05-20
17:50
Fukuoka Kyushu University, Chikushi Campus Numerical analysis of decoy state BBM92 quantum key distribution protocol with multi-photon rejection source
Takumi Matsuura, Liang Min, Kazuhisa Ogawa, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.)
The BB84 protocol, which is a representative quantum key distribution protocol, requires a single photon source as a lig... [more]
QIT
(2nd)
2019-05-20
13:20
Fukuoka Kyushu University, Chikushi Campus [Poster Presentation] Variance of observables and its uncertainty relation in pre- and post-selected systems
Natsuki Abe, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
A pre- and post-selected system has a complex characteristic value called weak value. The weak value in a pre- and post-... [more]
ITS, IE, ITE-MMS, ITE-HI, ITE-ME, ITE-AIT [detail] 2019-02-19
11:30
Hokkaido Hokkaido Univ. Improvement of noise separation accuracy in image reconstruction in virtual phase conjugation based optical tomography
Sota Nagayoshi, Atsushi Okamoto (Hokkaido Univ.), Yuta Goto (Fukui Univ.), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
Virtual phase conjugation based optical tomography (VPC-OT) realizes single-shot three-dimensional (3D) measurement. In ... [more]
ITS, IE, ITE-MMS, ITE-HI, ITE-ME, ITE-AIT [detail] 2019-02-20
13:00
Hokkaido Hokkaido Univ. Analysis on Basic Operation of Virtual Shift Method for Accuracy Improvement of Holographic Diversity Interferometry
Nobuhiro Yamagishi, Atsushi Okamoto, Tomohiro Maeda (Hokkaido Univ.), Jin Nozawa (Aisin Seiki), Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
Holographic diversity interferometry (HDI) enables single-shot phase measurement by using two image sensors. However, mi... [more]
ITS, IE, ITE-MMS, ITE-HI, ITE-ME, ITE-AIT [detail] 2019-02-20
13:45
Hokkaido Hokkaido Univ. Accuracy improvement of phase modulated signal by calibrating spatial light modulator
Tomohiro Maeda, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita (Hokkaido Univ.)
The modulation accuracy of phase-only spatial light modulators (SLMs) decreases by the distortion of the phase response ... [more]
 Results 1 - 20 of 35  /  [Next]  
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