Publications by authors named "Masato Koashi"

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F
Finite-size security of continuous-variable quantum key distribution with digital signal processing.
Takaya Matsuura, Kento Maeda, Toshihiko Sasaki, Masato Koashi

Nat Commun· January 2021

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Repeaterless quantum key distribution with efficient finite-key analysis overcoming the rate-distance limit.
Kento Maeda, Toshihiko Sasaki, Masato Koashi

Nat Commun· July 2019

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Rigorous characterization method for photon-number statistics.
Masahiro Kumazawa, Toshihiko Sasaki, Masato Koashi

Opt Express· February 2019

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Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network.
Rikizo Ikuta, Toshiki Kobayashi, Tetsuo Kawakami, Shigehito Miki, Masahiro Yabuno, Masato Koashi

Nat Commun· May 2018

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High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources.
Yoshiaki Tsujimoto, Motoki Tanaka, Nobuo Iwasaki, Rikizo Ikuta, Shigehito Miki, Masato Koashi

Sci Rep· January 2018

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Efficient Simulation of Quantum Error Correction Under Coherent Error Based on the Nonunitary Free-Fermionic Formalism.
Yasunari Suzuki, Keisuke Fujii, Masato Koashi

Phys Rev Lett· November 2017

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Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light.
Rikizo Ikuta, Shota Nozaki, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto

Sci Rep· July 2017

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High visibility Hong-Ou-Mandel interference via a time-resolved coincidence measurement.
Yoshiaki Tsujimoto, Yukihiro Sugiura, Motoki Tanaka, Rikizo Ikuta, Shigehito Miki, Masato Koashi

Opt Express· May 2017

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Mach-Zehnder interferometer using frequency-domain beamsplitter.
Toshiki Kobayashi, Daisuke Yamazaki, Kenichiro Matsuki, Rikizo Ikuta, Shigehito Miki, Masato Koashi

Opt Express· May 2017

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Extracting an entangled photon pair from collectively decohered pairs at a telecommunication wavelength.
Yoshiaki Tsujimoto, Yukihiro Sugiura, Makoto Ando, Daisuke Katsuse, Rikizo Ikuta, Masato Koashi

Opt Express· May 2015

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Practical quantum key distribution protocol without monitoring signal disturbance.
Toshihiko Sasaki, Yoshihisa Yamamoto, Masato Koashi

Nature· May 2014

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Frequency down-conversion of 637 nm light to the telecommunication band for non-classical light emitted from NV centers in diamond.
Rikizo Ikuta, Toshiki Kobayashi, Shuto Yasui, Shigehito Miki, Taro Yamashita, Masato Koashi

Opt Express· May 2014

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Observation of two output light pulses from a partial wavelength converter preserving phase of an input light at a single-photon level.
Rikizo Ikuta, Toshiki Kobayashi, Hiroshi Kato, Shigehito Miki, Taro Yamashita, Masato Koashi

Opt Express· November 2013

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Wide-band quantum interface for visible-to-telecommunication wavelength conversion.
Rikizo Ikuta, Yoshiaki Kusaka, Tsuyoshi Kitano, Hiroshi Kato, Takashi Yamamoto, Masato Koashi

Nat Commun· November 2011

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Efficient decoherence-free entanglement distribution over lossy quantum channels.
Rikizo Ikuta, Yohei Ono, Toshiyuki Tashima, Takashi Yamamoto, Masato Koashi

Phys Rev Lett· March 2011

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Demonstration of local expansion toward large-scale entangled webs.
Toshiyuki Tashima, Tsuyoshi Kitano, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi

Phys Rev Lett· November 2010

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Local transformation of two einstein-podolsky-rosen photon pairs into a three-photon w state.
Toshiyuki Tashima, Tetsuroh Wakatsuki, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi

Phys Rev Lett· April 2009

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Fidelity criterion for quantum-domain transmission and storage of coherent states beyond the unit-gain constraint.
Ryo Namiki, Masato Koashi, Nobuyuki Imoto

Phys Rev Lett· September 2008

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Generation of high-fidelity four-photon cluster state and quantum-domain demonstration of one-way quantum computing.
Yuuki Tokunaga, Shin Kuwashiro, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto

Phys Rev Lett· May 2008

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Simple and efficient quantum key distribution with parametric down-conversion.
Yoritoshi Adachi, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto

Phys Rev Lett· November 2007

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Unconditional security of coherent-state quantum key distribution with a strong phase-reference pulse.
Masato Koashi

Phys Rev Lett· September 2004

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Unconditionally secure key distribution based on two nonorthogonal states.
Kiyoshi Tamaki, Masato Koashi, Nobuyuki Imoto

Phys Rev Lett· April 2003

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Secure quantum key distribution with an uncharacterized source.
Masato Koashi, John Preskill

Phys Rev Lett· February 2003

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Experimental extraction of an entangled photon pair from two identically decohered pairs.
Takashi Yamamoto, Masato Koashi, Sahin Kaya Ozdemir, Nobuyuki Imoto

Nature· January 2003

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Configuration of separability and tests for multipartite entanglement in bell-type experiments.
Koji Nagata, Masato Koashi, Nobuyuki Imoto

Phys Rev Lett· December 2002

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