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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 72  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
PRMU, IBISML, IPSJ-CVIM 2024-03-03
09:24
Hiroshima Hiroshima Univ. Higashi-Hiroshima campus
(Primary: On-site, Secondary: Online)
Fine-grained Activity Recognition with Pretraining State Transitions in Manipulated Objects
Atsushi Okamoto, Katsufumi Inoue, Michifumi Yoshioka (Osaka Metropolitan Univ.) PRMU2023-53
(To be available after the conference date) [more] PRMU2023-53
pp.13-18
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]
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, OFT, OPE
(Joint) [detail]
2023-02-17
11:55
Okinawa kukuru-itomancity
(Primary: On-site, Secondary: Online)
Investigation of optical frequency domain mode equalizer using spatial light modulator
Yuta Goto, Satoshi Shinada (NICT), Atsushi Okamoto (Hokkaido Univ.), Hideaki Furukawa (NICT) OCS2022-83 OPE2022-112
In the mode-division multiplexing transmission, although the multi-input multi-output (MIMO) processing is required in t... [more] OCS2022-83 OPE2022-112
pp.68-72(OCS), pp.93-97(OPE)
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)
2022-05-31
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)
2021-11-30
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
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]
 Results 1 - 20 of 72  /  [Next]  
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