World's Best Scientists 2026 revealed!
Masato Koashi

Masato Koashi

D-Index & Metrics

Engineering and Technology

D-Index
47
Citations
10291
World Ranking
4785
National Ranking
76

Masato Koashi publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where Masato Koashi sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 208 publications — 51st percentile

51% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

Masato Koashi D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where Masato Koashi sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 47 D-Index — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Overview

Masato Koashi is affiliated with the University of Tokyo in Japan and has a research focus primarily in Computer Science and Physics and Astronomy. Their work spans both theoretical and applied aspects, with significant contributions to quantum information science and related areas.

The scientist's main fields of study include:

  • Computer Science
  • Physics and Astronomy

The subfields in which they have published notably are:

  • Artificial Intelligence
  • Atomic and Molecular Physics, and Optics
  • Computational Theory and Mathematics
  • Electrical and Electronic Engineering
  • Instrumentation

Masato Koashi's primary research topics cover several specialized areas within quantum science and technology, including:

  • Quantum Information and Cryptography
  • Quantum Computing Algorithms and Architecture
  • Quantum Mechanics and Applications
  • Quantum-Dot Cellular Automata
  • Quantum and electron transport phenomena
  • Orbital Angular Momentum in Optics
  • Advanced Optical Sensing Technologies

The scientist's publication record includes papers in a range of scientific venues, with a strong presence in both open-access archives and peer-reviewed journals. Frequent publication venues include:

  • arXiv (Cornell University)
  • Physical review. A/Physical review, A
  • Physical Review Research
  • Nature Physics
  • Quantum

Some recent and notable papers authored or coauthored by Masato Koashi are:

  • "Time-Efficient Constant-Space-Overhead Fault-Tolerant Quantum Computation", 2024, Nature Physics
  • "Deterministic preparation of W states via spin-photon interactions", 2021, Physical review. A/Physical review, A
  • "General framework for constructing fast and near-optimal machine-learning-based decoder of the topological stabilizer codes", 2020, Physical Review Research
  • "Black holes as clouded mirrors: the Hayden-Preskill protocol with symmetry", 2023, Quantum
  • "Polylog-overhead highly fault-tolerant measurement-based quantum computation: all-Gaussian implementation with Gottesman-Kitaev-Preskill code", 2020, arXiv (Cornell University)

Masato Koashi collaborates frequently with several coauthors in the field, with some of the most frequent collaborators being:

  • Takaya Matsuura
  • Toshihiko Sasaki
  • Hayata Yamasaki
  • Shinichiro Yamano
  • Yui Kuramochi

Best Publications

  • Quantum entanglement for secret sharing and secret splitting

    Anders Karlsson;Masato Koashi;Nobuyuki Imoto

  • Monogamy of quantum entanglement and other correlations

    Masato Koashi;Masato Koashi;Andreas Winter

  • Practical quantum key distribution protocol without monitoring signal disturbance

    Toshihiko Sasaki;Yoshihisa Yamamoto;Masato Koashi

  • Simple security proof of quantum key distribution based on complementarity

    M Koashi

  • Exact Eigenstates and Magnetic Response of Spin-1 and Spin-2 Bose-Einstein Condensates

    Masato Koashi;Masahito Ueda

  • Concentration and purification scheme for two partially entangled photon pairs

    Takashi Yamamoto;Masato Koashi;Nobuyuki Imoto

  • Direct observation of Hardy's paradox by joint weak measurement with an entangled photon pair

    Kazuhiro Yokota;Takashi Yamamoto;Masato Koashi;Nobuyuki Imoto

  • Experimental extraction of an entangled photon pair from two identically decohered pairs

    Takashi Yamamoto;Masato Koashi;Şahin Kaya Özdemir;Nobuyuki Imoto;Nobuyuki Imoto

  • Wide-band quantum interface for visible-to-telecommunication wavelength conversion.

    Rikizo Ikuta;Yoshiaki Kusaka;Tsuyoshi Kitano;Hiroshi Kato

  • Unconditionally secure key distribution based on two nonorthogonal states.

    Kiyoshi Tamaki;Masato Koashi;Nobuyuki Imoto

  • Simple and Efficient Quantum Key Distribution with Parametric Down-Conversion

    Yoritoshi Adachi;Takashi Yamamoto;Masato Koashi;Nobuyuki Imoto

  • Quantum Cryptography Based on Split Transmission of One-Bit Information in Two Steps

    Masato Koashi;Nobuyuki Imoto

  • Secure Quantum Key Distribution with an Uncharacterized Source

    Masato Koashi;John Preskill

  • Frequency-domain Hong–Ou–Mandel interference

    Toshiki Kobayashi;Rikizo Ikuta;Shuto Yasui;Shigehito Miki

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

    Masato Koashi

  • Entangled webs: Tight bound for symmetric sharing of entanglement

    Masato Koashi;Vladimír Bužek;Vladimír Bužek;Nobuyuki Imoto

  • Quantum key distribution with an efficient countermeasure against correlated intensity fluctuations in optical pulses

    Ken Ichiro Yoshino;Mikio Fujiwara;Kensuke Nakata;Tatsuya Sumiya

  • Theory of spin-2 Bose-Einstein condensates: Spin correlations, magnetic response, and excitation spectra

    Masahito Ueda;Masato Koashi

  • Reversing Measurement and Probabilistic Quantum Error Correction

    Masato Koashi;Masahito Ueda

  • Generation of high-fidelity four-photon cluster state and quantum-domain demonstration of one-way quantum computing.

    Yuuki Tokunaga;Yuuki Tokunaga;Shin Kuwashiro;Takashi Yamamoto;Masato Koashi

  • Probabilistic manipulation of entangled photons

    Masato Koashi;Takashi Yamamoto;Nobuyuki Imoto

Frequent Co-Authors

Nobuyuki Imoto
Nobuyuki Imoto Osaka University
Taro Yamashita
Taro Yamashita Tohoku University
Shigehito Miki
Shigehito Miki National Institute of Information and Communications Technology
Mikio Fujiwara
Mikio Fujiwara National Institute of Information and Communications Technology
Yu-xi Liu
Yu-xi Liu Tsinghua University
Masahide Sasaki
Masahide Sasaki National Institute of Information and Communications Technology
Andreas Winter
Andreas Winter University of Cologne
Masahito Ueda
Masahito Ueda University of Tokyo
Sandu Popescu
Sandu Popescu University of Bristol
Franco Nori
Franco Nori University of Michigan–Ann Arbor

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