Ryo Namba

1.4k total citations
30 papers, 860 citations indexed

About

Ryo Namba is a scholar working on Astronomy and Astrophysics, Nuclear and High Energy Physics and Oceanography. According to data from OpenAlex, Ryo Namba has authored 30 papers receiving a total of 860 indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Astronomy and Astrophysics, 21 papers in Nuclear and High Energy Physics and 5 papers in Oceanography. Recurrent topics in Ryo Namba's work include Cosmology and Gravitation Theories (28 papers), Black Holes and Theoretical Physics (16 papers) and Solar and Space Plasma Dynamics (7 papers). Ryo Namba is often cited by papers focused on Cosmology and Gravitation Theories (28 papers), Black Holes and Theoretical Physics (16 papers) and Solar and Space Plasma Dynamics (7 papers). Ryo Namba collaborates with scholars based in Japan, United States and Canada. Ryo Namba's co-authors include Marco Peloso, Shinji Mukohyama, Neil Barnaby, Tomohiro Fujita, Gary Shiu, Yuichiro Tada, Peng Zhou, Jordan Moxon, Guillem Domènech and Hiroyuki Tashiro and has published in prestigious journals such as Physics Letters B, Journal of High Energy Physics and Physical review. D.

In The Last Decade

Ryo Namba

29 papers receiving 847 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ryo Namba Japan 15 843 587 191 45 22 30 860
Ioannis D. Gialamas Estonia 13 474 0.6× 364 0.6× 104 0.5× 24 0.5× 30 1.4× 24 526
Matteo Braglia Italy 17 761 0.9× 494 0.8× 103 0.5× 30 0.7× 15 0.7× 24 796
Ertan Güdekli Türkiye 15 598 0.7× 473 0.8× 120 0.6× 62 1.4× 28 1.3× 76 628
Ievgen Vovk Germany 7 808 1.0× 652 1.1× 111 0.6× 24 0.5× 34 1.5× 24 923
Kishore N. Ananda South Africa 9 835 1.0× 575 1.0× 129 0.7× 37 0.8× 12 0.5× 11 848
Mushtaq Ahmad Pakistan 15 650 0.8× 488 0.8× 152 0.8× 54 1.2× 11 0.5× 30 680
Arfa Waseem China 16 623 0.7× 462 0.8× 127 0.7× 48 1.1× 17 0.8× 53 659
Oliver F. Piattella Brazil 19 1.1k 1.3× 814 1.4× 109 0.6× 127 2.8× 46 2.1× 54 1.1k
Emanuela Dimastrogiovanni United States 17 834 1.0× 534 0.9× 127 0.7× 35 0.8× 10 0.5× 31 855
Mehrdad Farhoudi Iran 15 800 0.9× 696 1.2× 170 0.9× 107 2.4× 31 1.4× 30 836

Countries citing papers authored by Ryo Namba

Since Specialization
Citations

This map shows the geographic impact of Ryo Namba'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 Ryo Namba with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryo Namba more than expected).

Fields of papers citing papers by Ryo Namba

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryo Namba. 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 Ryo Namba. The network helps show where Ryo Namba may publish in the future.

Co-authorship network of co-authors of Ryo Namba

This figure shows the co-authorship network connecting the top 25 collaborators of Ryo Namba. A scholar is included among the top collaborators of Ryo Namba 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 Ryo Namba. Ryo Namba 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.
Ganz, Alexander, et al.. (2025). Bispectrum from inflation/bouncing Universe in VCDM. International Journal of Modern Physics A. 40(33). 2 indexed citations
2.
Namba, Ryo, et al.. (2025). Path to an exact WKB analysis of black hole quasinormal modes. Physical review. D. 111(12). 3 indexed citations
3.
Nakai, Yuichiro, et al.. (2024). Can we explain cosmic birefringence without a new light field beyond Standard Model?. Journal of High Energy Physics. 2024(1). 9 indexed citations
4.
Nakai, Yuichiro, Ryo Namba, & Ippei Obata. (2023). Peaky production of light dark photon dark matter. Journal of Cosmology and Astroparticle Physics. 2023(8). 32–32. 6 indexed citations
5.
Ganz, Alexander, et al.. (2023). Bouncing cosmology in VCDM. Journal of Cosmology and Astroparticle Physics. 2023(4). 60–60. 13 indexed citations
6.
Mukohyama, Shinji, et al.. (2022). Reheating after relaxation of large cosmological constant. Journal of Cosmology and Astroparticle Physics. 2022(11). 47–47. 1 indexed citations
7.
Murai, Kai, et al.. (2022). Universality of linear perturbations in SU(N) natural inflation. Physical review. D. 105(10). 10 indexed citations
8.
Gümrükçüoğlu, A. Emir & Ryo Namba. (2019). Role of matter in gravitation: Going beyond the Einstein-Maxwell theory. Physical review. D. 100(12). 13 indexed citations
9.
McDonough, Evan, et al.. (2018). Inflationary magneto-(non)genesis, increasing kinetic couplings, and the strong coupling problem. Classical and Quantum Gravity. 35(10). 105015–105015. 12 indexed citations
10.
Coates, Andrew, et al.. (2018). Solving the flatness problem with an anisotropic instanton in Hořava-Lifshitz gravity. Physical review. D. 97(4). 10 indexed citations
11.
Fujita, Tomohiro, Ryo Namba, & Yuichiro Tada. (2017). Does the detection of primordial gravitational waves exclude low energy inflation?. Physics Letters B. 778. 17–21. 24 indexed citations
12.
Larrouturou, François, et al.. (2017). Where does curvaton reside? Differences between bulk and brane frames. Physical review. D. 95(6).
13.
Fujita, Tomohiro & Ryo Namba. (2016). Pre-reheating magnetogenesis in the kinetic coupling model. Physical review. D. 94(4). 30 indexed citations
14.
Mukohyama, Shinji, et al.. (2016). Is the DBI scalar field as fragile as otherk-essence fields?. Physical review. D. 94(2). 16 indexed citations
15.
Aoki, Katsuki, Kei-ichi Maeda, & Ryo Namba. (2015). Stability of the early universe in bigravity theory. Physical review. D. Particles, fields, gravitation, and cosmology. 92(4). 20 indexed citations
16.
Domènech, Guillem, et al.. (2015). Derivative-dependent metric transformation and physical degrees of freedom. Physical review. D. Particles, fields, gravitation, and cosmology. 92(8). 69 indexed citations
17.
Mukohyama, Shinji, Ryo Namba, Marco Peloso, & Gary Shiu. (2014). Blue tensor spectrum from particle production during inflation. Journal of Cosmology and Astroparticle Physics. 2014(8). 36–36. 75 indexed citations
18.
Crowder, S. G., Ryo Namba, Vuk Mandic, Shinji Mukohyama, & Marco Peloso. (2013). Measurement of parity violation in the early universe using gravitational-wave detectors. Physics Letters B. 726(1-3). 66–71. 62 indexed citations
19.
Barnaby, Neil, Ryo Namba, & Marco Peloso. (2012). Observable non-Gaussianity from gauge field production in slow roll inflation, and a challenging connection with magnetogenesis. Physical review. D. Particles, fields, gravitation, and cosmology. 85(12). 108 indexed citations
20.
Barnaby, Neil, Jordan Moxon, Ryo Namba, et al.. (2012). Gravity waves and non-Gaussian features from particle production in a sector gravitationally coupled to the inflaton. Physical review. D. Particles, fields, gravitation, and cosmology. 86(10). 111 indexed citations

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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