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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| QIT (2nd) |
2023-12-17 16:45 |
Okinawa | OIST (Primary: On-site, Secondary: Online) |
Hybrid Quantum Information Processing with Squeezed Cat Codes Shohei Kiryu, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ) |
We propose a hybrid quantum computation of squeezed cat codes and qubits. Since hybrid quantum teleportation is essentia... [more] | |
| QIT (2nd) |
2023-12-19 09:30 |
Okinawa | OIST (Primary: On-site, Secondary: Online) |
Evaluation of Photon Number Distribution for Security Ensuring of Quantum Key Distribution Ryoji Matsumoto, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.) |
In QKD using WCP sources, PNS attack exploiting multiphoton pulses affects security of the system. Decoy method can be u... [more] | |
| QIT (2nd) |
2023-12-17 17:30 |
Okinawa | OIST (Primary: On-site, Secondary: Online) |
An Effective Countermeasure against Time-Shift Attack and Comprehensive Analyses of Decoy-State QKD under Finite-Size Effects Toshitsugu Kato, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.) |
One factor hindering the practical implementation of quantum cryptography is the vulnerability to eavesdropping attacks ... [more] | |
| QIT (2nd) |
2023-12-17 17:30 |
Okinawa | OIST (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Verification of identifiability of quantum states in quantum key delivery Shunya Tajima, Atsushi Okamoto, Akihisa Tomita (hokudai) |
In quantum key distribution, it is required that when creating the transmission state, the state is identical in all deg... [more] | |
| QIT (2nd) |
2023-12-17 17:30 |
Okinawa | OIST (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Quantum Reservoir Computing Utilizing Quantum Chaotic Systems with Heisenberg XXZ Spin Chains Shu Komatsugawa, Akihisa Tomita, Atsushi Okamoto (Hokkaido Univ.) |
Reservoir Computing (RC) is a machine learning method that aims to achieve both high learning performance and low learni... [more] | |
| QIT (2nd) |
2023-12-17 17:30 |
Okinawa | OIST (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Characteristic Function and Susceptibility as Quasiprobability Haruki Emori, Akihisa Tomita (Hokkaido Univ.) |
Quasiprobability is widely used as a tool to capture the essence and completely characterize the distribution of quantum... [more] | |
| OCS, OFT, IEE-CMN, ITE-BCT (Joint) [detail] |
2023-11-09 16:45 |
Kyoto | (Primary: On-site, Secondary: Online) |
Phase Compensation Method in Mode Selective Switch Using Volume Holographic De-multiplexer Yui Yoshikata, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.)  OCS2023-44 |
In mode-division multiplex (MDM) communication using few-mode fiber, it is expected to realize ROADM by introducing mode... [more] | OCS2023-44 pp.6-11 |
| OCS, CS (Joint) |
2023-01-13 09:25 |
Fukuoka | CANAL CITY HAKATA (Primary: On-site, Secondary: Online) |
Phase compensation method in core-selective switch for few-mode multi-core fiber using spatial light modulator Ryo Watanabe, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.) OCS2022-63 |
In order to realize Dence SDM transmission using Few-Mode Multi-Core Fiber(FM-MCF), a switching device adapted to spatia... [more] | OCS2022-63 pp.18-21 |
| QIT (2nd) |
2022-12-08 14:00 |
Kanagawa | Keio Univ. (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Quantum State Generation using DPQPSK Modulator for High Speed Quantum Key Distribution Yuki Sugawara, Akihisa Tomita, Atsushi Okamoto (Hokkaido Univ.) |
In implementing a high-speed QKD system, distortions in the modulation signal degrade the performance of the QKD system.... [more] | |
| QIT (2nd) |
2022-12-08 14:00 |
Kanagawa | Keio Univ. (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Disturbance Evaluation Circuit in Quantum Measurement Haruki Emori (Hokkaido Univ./NICT), Masanao Ozawa (Chubu Univ./Nagoya Univ.), Akihisa Tomita (Hokkaido Univ.) |
Two evaluation methods, the three-state method and the weak measurement method, were proposed for disturbances in quantu... [more] | |
| QIT (2nd) |
2022-05-31 11:30 |
Online | Online | Mitigation-based benchmarking for NISQ devices Haruki Emori, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.) |
This study applies quantum error mitigation (QEM) according to the type of quantum error and estimates the average gate ... [more] | |
| IE, ITS, ITE-AIT, ITE-ME, ITE-MMS [detail] | 2022-02-21 14:40 |
Online | Online | Effect of post-exposure time on diffraction efficiency of volume holograms during recording Yuya Kuroda, Atsushi Okamoto (Hokkaido Univ.), Satoshi Shinada, Yuta Goto (NICT), Akihisa Tomita (Hokkaido Univ.) |
To realize the mode division multiplexing transmission, we have proposed a volume holographic mode de-multiplexer (VHDM)... [more] | |
| IE, ITS, ITE-AIT, ITE-ME, ITE-MMS [detail] | 2022-02-21 15:05 |
Online | Online | Mode diffusion technique for reduction of crosstalk in volume holographic mode demultiplexer Shuanglu Zhang, Atsushi Okamoto, Akihisa Tomita (Hokkaido Univ.) |
Volume holographic demultiplexers (VHDMs) utilize angularly multiplexed volume holograms to separate multiplexed spatial... [more] | |
| IE, ITS, ITE-AIT, ITE-ME, ITE-MMS [detail] | 2022-02-21 15:20 |
Online | Online | Resolution in 3D super-resolution projection using single-lens spatial cross modulation method Xinruinan Zhang, Atsushi Okamoto (Hokkaido Univ.), Hisatoshi Funakoshi (Gifu Univ.), Shuanglu Zhang, Akihisa Tomita (Hokkaido Univ.) |
Spatial cross modulation (SCMM) can regenerate optical complex amplitudes by combining a single spatial light modulator ... [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] | |
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