Search Results - "Tomita, Akihisa"

High-Threshold Fault-Tolerant Quantum Computation with Analog Quantum Error Correction by Fukui, Kosuke, Tomita, Akihisa, Okamoto, Atsushi, Fujii, Keisuke

“…To implement fault-tolerant quantum computation with continuous variables, the Gottesman-Kitaev-Preskill (GKP) qubit has been recognized as an important…”
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A framework for measuring weak values without weak interactions and its diagrammatic representation by Ogawa, Kazuhisa, Yasuhiko, Osamu, Kobayashi, Hirokazu, Nakanishi, Toshihiro, Tomita, Akihisa

“…Weak values are typically obtained experimentally by performing weak measurements, which involve weak interactions between the measured system and a probe…”
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Direct measurement of ultrafast temporal wavefunctions by Ogawa, Kazuhisa, Okazaki, Takumi, Kobayashi, Hirokazu, Nakanishi, Toshihiro, Tomita, Akihisa

“…The large capacity and robustness of information encoding in the temporal mode of photons is important in quantum information processing, in which…”
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Spatial cross modulation method using a random diffuser and phase-only spatial light modulator for constructing arbitrary complex fields by Shibukawa, Atsushi, Okamoto, Atsushi, Takabayashi, Masanori, Tomita, Akihisa

“…We propose a spatial cross modulation method using a random diffuser and a phase-only spatial light modulator (SLM), by which arbitrary complex-amplitude…”
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Spatial-light-modulator-based optical-fiber joint switch for few-mode multicore fibers by Zhang, Shuanglu, Okamoto, Atsushi, Abe, Yuta, Watanabe, Ryo, Tomita, Akihisa, Soma, Daiki, Wakayama, Yuta, Tsuritani, Takehiro

“…To realize simplified cost-efficient optical networks with routing flexibility and scaling potential, a spatial-light-modulator-based optical-fiber joint…”
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Holographic diversity interferometry for optical storage by Okamoto, Atsushi, Kunori, Keisuke, Takabayashi, Masanori, Tomita, Akihisa, Sato, Kunihiro

“…This study proposes holographic diversity interferometry (HDI), a system that combines information from spatially dispersed plural image sensors to reconstruct…”
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Digital phase conjugate mirror by parallel arrangement of two phase-only spatial light modulators by Shibukawa, Atsushi, Okamoto, Atsushi, Goto, Yuta, Honma, Satoshi, Tomita, Akihisa

“…In a conventional digital phase conjugation system, only the phase of an input light is time-reversed. This deteriorates phase conjugation fidelity and…”
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Virtual interferogram-generation algorithm for robust complex amplitude measurement using two interferograms by Nozawa, Jin, Okamoto, Atsushi, Ogawa, Kazuhisa, Tomita, Akihisa

“…We propose a virtual interferogram-generation algorithm using two interferograms. This algorithm can measure a complex amplitude of a signal beam with high…”
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Complex counterpart of variance in quantum measurements for pre- and postselected systems by Ogawa, Kazuhisa, Abe, Natsuki, Kobayashi, Hirokazu, Tomita, Akihisa

“…The variance of an observable in a preselected quantum system, which is always real and non-negative, appears as an increase in the probe wave packet width in…”
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Reference-free holographic diversity interferometry via iterative measurements for high accuracy phase detection by Goto, Yuta, Okamoto, Atsushi, Wakayama, Yuta, Ogawa, Kazuhisa, Nozawa, Jin, Tomita, Akihisa, Tsuritani, Takehiro

“…To obtain a phase distribution without the use of an optical path besides an object beam, a reference-free holographic diversity interferometry (RF-HDI) has…”
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Security in Photonic Networks: Threats and Security Enhancement by Kitayama, K-I, Sasaki, M., Araki, S., Tsubokawa, M., Tomita, A., Inoue, K., Harasawa, K., Nagasako, Y., Takada, A.

“…We address emerging threats to the security of photonic networks as these networks become heterogeneous being opened to the upper layers, other operators, and…”
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High-Speed Quantum Key Distribution System for 1-Mbps Real-Time Key Generation by Tanaka, A., Fujiwara, M., Yoshino, K., Takahashi, S., Nambu, Y., Tomita, A., Miki, S., Yamashita, T., Wang, Z., Sasaki, M., Tajima, A.

“…A high-speed quantum key distribution (QKD) system has been developed with the goal of a 1-Mbps final secure key generation rate under 10-dB transmission loss,…”
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Lightwave propagation through a 120° sharply bent single-line-defect photonic crystal waveguide by Tokushima, Masatoshi, Kosaka, Hideo, Tomita, Akihisa, Yamada, Hirohito

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Analysis of the effects of the two-photon temporal distinguishability on measurement-device-independent quantum key distribution (January 2023) by Ge, H-B., Tomita, A., Okamoto, A., Ogawa, K.

“…Measurement-device-independent quantum key distribution (MDI-QKD) protects legitimate users from attacks on measurement devices. The decoy method allows for…”
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Digital image multiplexing/demultiplexing method using spatial spectral diffusion and virtual phase conjugation technique for reduction of dynamic range consumption in holographic medium by Goto, Yuta, Okamoto, Atsushi, Takabayashi, Masanori, Ogawa, Kazuhisa, Tomita, Akihisa

“…The recording density in holographic data storage (HDS) systems is determined by the dynamic range of the recording medium. If a hologram is recorded with a…”
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Quantum encoder and decoder for practical quantum key distribution using a planar lightwave circuit by Nambu, Yoshihiro, Yoshino, Ken'ichiro, Tomita, Akihisa

“…To launch quantum key distribution (QKD) into the commercial market, it is important to develop a system that is simpler and more reliable using current…”
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Self-collimating phenomena in photonic crystals by Kosaka, Hideo, Kawashima, Takayuki, Tomita, Akihisa, Notomi, Masaya, Tamamura, Toshiaki, Sato, Takashi, Kawakami, Shojiro

“…We found that self-determining collimated light is generated in a photonic crystal fabricated on silicon. The divergence of the collimated beam is insensitive…”
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Symbol Error Characteristics of Hybrid-Modulated Holographic Data Storage by Intensity and Multi Phase Modulation by Takabayashi, Masanori, Okamoto, Atsushi, Tomita, Akihisa, Bunsen, Masatoshi

“…For the purpose of increasing the data density of holographic memories, we propose a novel signal modulation method named hybrid modulation method, which is a…”
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Digital confocal microscopy using a virtual 4f-system based on numerical beam propagation for depth measurement without mechanical scanning by Goto, Yuta, Okamoto, Atsushi, Toda, Masataka, Kuno, Yasuyuki, Nozawa, Jin, Ogawa, Kazuhisa, Tomita, Akihisa

“…We propose a digital confocal microscope using a virtual 4f-system based on numerical beam propagation for depth measurement without mechanical scanning. In…”
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Double-Referential Holography and Spatial Quadrature Amplitude Modulation by Zukeran, Keisuke, Okamoto, Atsushi, Takabayashi, Masanori, Shibukawa, Atsushi, Sato, Kunihiro, Tomita, Akihisa

“…We proposed a double-referential holography (DRH) that allows phase-detection without external additional beams. In the DRH, phantom beams, prepared in the…”
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