Izumi Ojima

3.4k total citations · 1 hit paper
61 papers, 2.3k citations indexed

About

Izumi Ojima is a scholar working on Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics and Nuclear and High Energy Physics. According to data from OpenAlex, Izumi Ojima has authored 61 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 33 papers in Atomic and Molecular Physics, and Optics, 26 papers in Statistical and Nonlinear Physics and 18 papers in Nuclear and High Energy Physics. Recurrent topics in Izumi Ojima's work include Quantum Mechanics and Applications (22 papers), Black Holes and Theoretical Physics (15 papers) and Cosmology and Gravitation Theories (11 papers). Izumi Ojima is often cited by papers focused on Quantum Mechanics and Applications (22 papers), Black Holes and Theoretical Physics (15 papers) and Cosmology and Gravitation Theories (11 papers). Izumi Ojima collaborates with scholars based in Japan, Germany and Canada. Izumi Ojima's co-authors include Taichiro Kugo, Noboru Nakanishi, H. Umezawa, H. Matsumoto, T. Yanagida, Detlev Buchholz, Hayato Saigo, Huzihiro Araki, Hiroshi Hasegawa and Mitsuhisa Ichiyanagi and has published in prestigious journals such as Physical Review Letters, PLoS ONE and Nuclear Physics B.

In The Last Decade

Izumi Ojima

57 papers receiving 2.2k citations

Hit Papers

Local Covariant Operator Formalism of Non-Abelian Gauge T... 1979 2026 1994 2010 1979 250 500 750
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Local Covariant Operator Formalism of Non-Abelian Gauge Theories and Quark Confinement Problem
    1979 756 citations Taichiro Kugo, Izumi Ojima Progress of Theoretical Physics Supplement profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Izumi Ojima Japan 21 1.6k 748 688 540 213 61 2.3k
A. Stern United States 22 1.4k 0.9× 780 1.0× 408 0.6× 500 0.9× 161 0.8× 108 1.8k
Franco Strocchi Italy 25 1.1k 0.7× 517 0.7× 776 1.1× 280 0.5× 268 1.3× 103 2.0k
E.G. Floratos Greece 27 2.1k 1.3× 516 0.7× 301 0.4× 362 0.7× 172 0.8× 89 2.5k
K. Bardakçi United States 26 1.5k 1.0× 553 0.7× 370 0.5× 357 0.7× 120 0.6× 81 2.0k
C. Becchi Italy 17 2.8k 1.8× 945 1.3× 470 0.7× 655 1.2× 259 1.2× 48 3.3k
I. V. Tyutin Russia 21 1.3k 0.8× 765 1.0× 416 0.6× 461 0.9× 236 1.1× 133 1.8k
P. A. Horváthy France 27 1.7k 1.0× 1.3k 1.8× 1.0k 1.5× 1.1k 2.1× 140 0.7× 129 2.6k
A. Rouet France 12 2.2k 1.4× 926 1.2× 434 0.6× 626 1.2× 247 1.2× 30 2.7k
G. Furlan Italy 25 2.0k 1.3× 617 0.8× 670 1.0× 448 0.8× 135 0.6× 89 2.6k
L. Dolan United States 18 2.0k 1.3× 694 0.9× 490 0.7× 1.1k 2.0× 126 0.6× 43 2.6k

Countries citing papers authored by Izumi Ojima

Since Specialization
Citations

This map shows the geographic impact of Izumi Ojima's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Izumi Ojima with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Izumi Ojima more than expected).

Fields of papers citing papers by Izumi Ojima

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Izumi Ojima. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Izumi Ojima. The network helps show where Izumi Ojima may publish in the future.

Co-authorship network of co-authors of Izumi Ojima

This figure shows the co-authorship network connecting the top 25 collaborators of Izumi Ojima. A scholar is included among the top collaborators of Izumi Ojima based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Izumi Ojima. Izumi Ojima is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Sakuma, Hirofumi, Izumi Ojima, Motoichi Ohtsu, & Tadashi Kawazoe. (2021). Drastic advancement in nanophotonics achieved by a new dressed photon study. Journal of the European Optical Society Rapid Publications. 17(1).
2.
Sakuma, Hirofumi, Izumi Ojima, Motoichi Ohtsu, & Hiroyuki Ochiai. (2020). Off-Shell Quantum Fields to Connect Dressed Photons with Cosmology. Symmetry. 12(8). 1244–1244. 3 indexed citations
3.
Saigo, Hayato, et al.. (2019). Analysis of Soft Robotics Based on the Concept of Category of Mobility. Complexity. 2019(1). 11 indexed citations
4.
Naruse, Makoto, Eiji Yamamoto, Takashi Nakao, et al.. (2018). Why is the environment important for decision making? Local reservoir model for choice-based learning. PLoS ONE. 13(10). e0205161–e0205161. 9 indexed citations
5.
Sakuma, Hirofumi, Izumi Ojima, & Motoichi Ohtsu. (2017). Dressed photons in a new paradigm of off-shell quantum fields. Progress in Quantum Electronics. 55. 74–87. 4 indexed citations
6.
Naruse, Makoto, Masashi Aono, Song-Ju Kim, et al.. (2017). Category Theory Approach to Solution Searching Based on Photoexcitation Transfer Dynamics. Philosophies. 2(3). 16–16. 2 indexed citations
7.
Sakuma, Hirofumi, Izumi Ojima, & Motoichi Ohtsu. (2017). Gauge symmetry breaking and emergence of Clebsch-dual electromagnetic field as a model of dressed photons. Applied Physics A. 123(12). 4 indexed citations
8.
Ojima, Izumi, et al.. (2016). Local State and Sector Theory in Local Quantum Physics. Letters in Mathematical Physics. 106(6). 741–763. 1 indexed citations
9.
Saigo, Hayato, et al.. (2014). NOTES ON THE KRUPA-ZAWISZA ULTRAPOWER OF SELF-ADJOINT OPERATORS. 1 indexed citations
10.
Ojima, Izumi, et al.. (2007). How to Observe Quantum Fields and Recover Them From Observational Data?. Open Systems & Information Dynamics. 14(3). 307–318. 5 indexed citations
11.
Ojima, Izumi. (2004). Temperature as Order Parameter of Broken Scale Invariance. Publications of the Research Institute for Mathematical Sciences. 40(3). 731–756. 8 indexed citations
12.
Ojima, Izumi. (2003). NON-EQUILIBRIUM LOCAL STATES IN RELATIVISTIC QUANTUM FIELD THEORY. 48–67. 2 indexed citations
13.
Buchholz, Detlev, et al.. (2001). Thermodynamic Properties of Non-Equilibrium States in Quantum Field Theory. 22 indexed citations
14.
Ojima, Izumi. (2000). A Simple Derivation of Josephson's Formulae in Superconductivity. Letters in Mathematical Physics. 51(4). 257–264. 1 indexed citations
15.
Buchholz, Detlev & Izumi Ojima. (1997). Spontaneous collapse of supersymmetry. Nuclear Physics B. 498(1-2). 228–242. 21 indexed citations
16.
Haag, Rudolf & Izumi Ojima. (1996). On the problem of defining a specific theory within the frame of local quantum physics. CERN Document Server (European Organization for Nuclear Research). 64(4). 385–393. 4 indexed citations
17.
Nakanishi, Noboru & Izumi Ojima. (1990). Covariant Operator Formalism of Gauge Theories and Quantum Gravity. 209 indexed citations
18.
Ojima, Izumi. (1986). Lorentz invariance vs. temperature in QFT. Letters in Mathematical Physics. 11(1). 73–80. 24 indexed citations
19.
Fujimoto, Yasushi, H. Matsumoto, H. Umezawa, & Izumi Ojima. (1984). Mass-derivative formula and the singularity structure in thermo field dynamics. Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields. 30(6). 1400–1403. 22 indexed citations
20.
Kugo, Taichiro & Izumi Ojima. (1979). Local Covariant Operator Formalism of Non-Abelian Gauge Theories and Quark Confinement Problem. Progress of Theoretical Physics Supplement. 66. 1–130. 756 indexed citations breakdown →

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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