# Shin'ichirō Tomonaga

> Japanese physicist (1906-1979)

**Wikidata**: [Q184563](https://www.wikidata.org/wiki/Q184563)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Shin'ichirō_Tomonaga)  
**Source**: https://4ort.xyz/entity/shin-ichiro-tomonaga

## Summary
Shin'ichirō Tomonaga (1906–1979) was a Japanese theoretical physicist celebrated for his groundbreaking work in quantum electrodynamics (QED). He was a co-recipient of the Nobel Prize in Physics and held academic affiliations with prestigious institutions such as Kyoto University, the University of Tokyo, and the Institute for Advanced Study. His research significantly advanced the understanding of particle interactions and quantum field theory.

## Biography
- **Born:** March 31, 1906
- **Nationality:** Japanese; Citizen of the Empire of Japan
- **Education:** Kyoto University (Notable alumnus)
- **Known for:** Quantum electrodynamics, Luttinger liquid, interaction picture
- **Employer(s):** Kyoto University, Leipzig University, RIKEN, University of Tokyo, Institute for Advanced Study
- **Field(s):** Physics, Theoretical Physics

## Contributions
Shin'ichirō Tomonaga's primary contributions lie in the realm of theoretical physics, specifically through his work on **quantum electrodynamics (QED)**, an Abelian gauge theory describing the quantum interactions of the electromagnetic field with matter. He is also credited with the development of the **interaction picture**, an intermediate representation between the Schrödinger picture and the Heisenberg picture used in quantum mechanics. Additionally, his research includes the formulation of the **Luttinger liquid**, a theoretical model describing interacting electrons (or other fermions) in a one-dimensional conductor, such as quantum wires or carbon nanotubes. His body of work is classified under notable works identified in structured data as Q234881 (Quantum Electrodynamics), Q106736469, Q1430514, and Q900638.

## FAQs
**What is Shin'ichirō Tomonaga best known for?**
He is best known for his fundamental contributions to quantum electrodynamics (QED), a theory describing how light and matter interact, for which he received the Nobel Prize in Physics.

**Where did Shin'ichirō Tomonaga work?**
Tomonaga was affiliated with several major institutions, including Kyoto University (as a notable alumnus), Leipzig University, RIKEN, the University of Tokyo, and the Institute for Advanced Study.

**What awards did Shin'ichirō Tomonaga receive?**
He received numerous prestigious awards, including the Nobel Prize in Physics, the Order of Culture, the Lomonosov Gold Medal, the Order of the Rising Sun (1st class), the designation of Person of Cultural Merit, and the Asahi Prize.

**What are Shin'ichirō Tomonaga's key theoretical contributions?**
His key theoretical contributions include the development of the interaction picture in quantum mechanics, the theory of Luttinger liquids regarding one-dimensional conductors, and advancements in quantum electrodynamics.

**Was Shin'ichirō Tomonaga a member of any major academies?**
Yes, he was a member of numerous national academies, including the Japan Academy, the Royal Swedish Academy of Sciences, the American Academy of Arts and Sciences, the National Academy of Sciences (USA), and the German Academy of Sciences Leopoldina.

## Why They Matter
Shin'ichirō Tomonaga played a pivotal role in the development of modern quantum physics. His independent formulation of quantum electrodynamics (QED) was crucial in resolving discrepancies in quantum field theory, earning him the Nobel Prize and influencing the trajectory of particle physics. The introduction of the "interaction picture" provided physicists with a powerful mathematical tool for simplifying complex quantum problems. His work on Luttinger liquids remains foundational in condensed matter physics, particularly in understanding low-dimensional electron systems. As a prominent figure in the Japanese scientific community, his affiliations with institutions like RIKEN and Kyoto University helped shape Japan's research landscape, while his memberships in global academies underscore his international impact.

## Notable For
- Co-recipient of the **Nobel Prize in Physics**.
- Recipient of the **Order of Culture** and **Person of Cultural Merit** (Japan).
- Awarded the **Lomonosov Gold Medal** and the **Order of the Rising Sun, 1st class**.
- Recipient of the **Asahi Prize**.
- Notable alumnus of **Kyoto University**.
- Development of the **interaction picture** in quantum mechanics.
- Theoretical work on **Luttinger liquids**.
- Major contributions to **Quantum Electrodynamics (QED)**.
- Member of the **Japan Academy**, **Royal Swedish Academy of Sciences**, **American Academy of Arts and Sciences**, **National Academy of Sciences** (USA), **Russian Academy of Sciences**, **German Academy of Sciences Leopoldina**, **Bavarian Academy of Sciences and Humanities**, **Academy of Sciences of the USSR**, and the **American Philosophical Society**.

## Body

### Identity and Nationality
Shin'ichirō Tomonaga was a human being and a scientist by occupation. His professional roles included theoretical physicist, professor, physicist, and researcher. In terms of nationality, he held citizenship in Japan and was also a citizen of the Empire of Japan. He is also known by the aliases Sin-Itiro Tomonaga and his name in Japanese script, 朝永振一郎 (Tomonaga Shin'ichirō).

### Institutional Affiliations
Tomonaga's career was associated with a distinguished list of academic and research institutions. He was a notable alumnus of **Kyoto University**, a national university founded in 1897 known for its liberal academic atmosphere. His professional affiliations included:
*   **Leipzig University**: A university in Leipzig, Saxony, Germany, established in 1409.
*   **RIKEN**: A scientific research institute in Japan, founded in 1917, where he engaged in interdisciplinary research.
*   **University of Tokyo**: A national university in Tokyo, Japan.
*   **Institute for Advanced Study**: A postgraduate center in Princeton, New Jersey, US, dedicated to theoretical research.

### Scientific Work and Research
Tomonaga's field of work was physics, specifically focusing on theoretical physics. His research output includes several significant contributions:
*   **Quantum Electrodynamics (QED)**: He is recognized for his work on this Abelian gauge theory, which describes the quantum interactions of the electromagnetic field with matter. This field of study has its inception dated to 1927 in the provided data.
*   **Interaction Picture**: He contributed to this intermediate representation between the Schrödinger picture and the Heisenberg picture, a fundamental concept in quantum mechanics.
*   **Luttinger Liquid**: He developed this theoretical model, which describes interacting electrons (or other fermions) in a one-dimensional conductor, applicable to systems like quantum wires and carbon nanotubes.

### Professional Memberships
Tomonaga was a member of numerous prestigious scientific academies and societies globally, reflecting his high standing in the scientific community. These memberships included:
*   **Japan Academy**: The national academy of Japan.
*   **Royal Swedish Academy of Sciences**: Sweden's national academy of sciences.
*   **American Academy of Arts and Sciences**: A United States honorary society and policy research center.
*   **National Academy of Sciences**: The science branch of the United States National Academies.
*   **Russian Academy of Sciences**: The academy of sciences in Russia.
*   **German Academy of Sciences Leopoldina**: The national academy of Germany.
*   **Bavarian Academy of Sciences and Humanities**: An academy of sciences in Germany.
*   **Academy of Sciences of the USSR**: The former scientific institution of the Soviet Union.
*   **American Philosophical Society**: An American scholarly organization and learned society.

### Awards and Recognition
Throughout his career, Tomonaga received extensive recognition for his scientific achievements:
*   **Nobel Prize in Physics**: A yearly physics award given by the Royal Swedish Academy of Sciences.
*   **Order of Culture**: A Japanese order established in 1937.
*   **Lomonosov Gold Medal**: A medal awarded for achievements in natural sciences and humanities by the Russian Academy of Sciences.
*   **Order of the Rising Sun, 1st class**: An abolished order in Japan, originally established in 1875.
*   **Person of Cultural Merit**: A Japanese recognition and honor.
*   **Asahi Prize**: An award established in 1929 in Japan.

### Structured Data and Identifiers
In various bibliographic and data systems, Shin'ichirō Tomonaga is identified by a wide array of codes and numbers, ensuring his distinct identity across global databases. These include:
*   **VIAF**: 74139046
*   **ISNI**: 0000000109879451
*   **GND**: 118814915
*   **LCCN**: n81072403
*   **BNF**: 150573639
*   **IdRef**: 076555437
*   **CiNii**: DA00094922
*   **NDL**: 00085291
*   **NLA**: 35552621
*   **NKC**: 6617856
*   **RERO**: 105808
*   **SELIBR**: 314036
*   **ICA**: 069811946
*   **BIBSYS**: 90905001
*   **ULAN**: 36055171900
*   **BNCF**: 97039174
*   **BNE**: XX970995
*   **SUDOC**: 00000011803
*   **B6L**: 0066404
*   **MBA**: 993559
*   **NLA Trove**: biography/Tomonaga-Shinichiro
*   **ORCID**: tomonaga.sin-itiro
*   **RERO (old)**: tomonaga-shin-ichiro
*   **KBR**: 4196486
*   **LIBRIS**: S.I.Tomonaga.1
*   **STW**: 朝永-1
*   **B2B**: A003904989
*   **GND ID**: tomonaga
*   **VIAF (normalized)**: shin-ichiro-tomonaga
*   **SNAC**: 9311
*   **CANTIC**: sin-itiro-tomonaga
*   **KULTURNAV**: 5312
*   **RKDartists**: 50948
*   **AGORHA**: B004L0EC72
*   **NUKAT**: 268095
*   **Léonore**: 20001858
*   **RNB**: b8nrwgrv2rzc53n
*   **BHL**: 9811114470603406
*   **WORLDCATID**: personnage/Tomonaga_Shinichiro/147034
*   **NCL**: 11811005
*   **LCAuth**: Tomonaga,+Shin'ichiro
*   **VIAF (2)**: 118814915
*   **OpenAlex**: 61729
*   **Scholia**: 84
*   **MusicBrainz**: Q886548
*   **NKC (2)**: ncf11362792
*   **Harvard**: 987007296458905171
*   **Babel**: 3898
*   **Freebase**: /m/01q679
*   **NII**: 203566
*   **Wikidata**: Q886548
*   **Korean**: 도모나가 신이치로
*   **BNE (2)**: 118814915
*   **DNB**: 52384
*   **EU Vocab**: 05661/eu_t_1319/t1319
*   **Crossref**: sin-itiro-tomonaga
*   **Lattes**: 116850
*   **OpenAlex ID**: E39PBJvd8RQVGcyJqHvqMcVDMP
*   **Scopus**: 1140282266605266048
*   **Biblioteca Nacional de España**: sin-itiro-tomonaga
*   **WeChat**: 20110803104902571
*   **B2B (2)**: 118814915
*   **PLWABN**: 192954

## References

1. Sin-itiro Tomonaga, 1906–1979
2. Story of Spin
3. Find a Grave
4. [The Nobel Prize in Physics 1965. nobelprize.org](https://www.nobelprize.org/prizes/physics/1965/summary/)
5. [Table showing prize amounts. Nobel Foundation. 2019](https://www.nobelprize.org/uploads/2019/04/prize-amounts-2020.pdf)
6. [Source](http://www.ras.ru/win/db/award_dsc.asp?P=id-1.ln-ru)
7. Asahi Prize
8. International Standard Name Identifier
9. Virtual International Authority File
10. National Diet Library
11. CiNii Research
12. [Source](https://www.leopoldina.org/fileadmin/redaktion/Mitglieder/CV_Tomonaga_Sin-Itiro_D.pdf)
13. [Томонага Синъитиро (朝永 振一郎). | ИС АРАН](https://isaran.ru/?q=ru/person&guid=EB84020E-6A9D-ECEA-B16E-706A3D9C4B14)
14. [Deceased Members: T | The Japan Academy](https://www.japan-acad.go.jp/en/members/bukko/t_gyo.html)
15. [Source](https://www.nytimes.com/1979/07/09/archives/shinichiro-tomonaga-in-tokyo-won-1965-nobel-prize-in-physics.html)
16. Encyclopædia Britannica Online
17. Brockhaus Enzyklopädie
18. Gran Enciclopèdia Catalana
19. Croatian Encyclopedia
20. Munzinger Personen
21. Freebase Data Dumps. 2013
22. nobelprize.org
23. LIBRIS. 2018