was a Japanese physicist. Matsubara proposed a method of statistical mechanics related to

Green's function (many-body theory) In many-body theory, the term Green's function (or Green function) is sometimes used interchangeably with correlation function, but refers specifically to correlators of field operators or creation and annihilation operators. The name comes from ...

, by applying quantum field theory techniques to statistical physics. This method, commonly known as Matsubara Green's function technique, introduces the notion of imaginary time, and the reciprocal variable to this imaginary time is known as discrete Matsubara frequency. Matsubara graduated from Osaka Imperial University, and worked as full professor in

Hokkaido University , or , is a public research university in Sapporo, Hokkaido, Japan. Founded in 1918, it is the fifth-oldest government-authorised university in Japan and one of the former Imperial Universities. The university finds its roots in Sapporo A ...

Kyoto University , or , is a National university, national research university in Kyoto, Japan. Founded in 1897, it is one of the former Imperial Universities and the second oldest university in Japan. The university has ten undergraduate faculties, eighteen gra ...

, and

Okayama University of Science is a private university in Okayama, Okayama, Japan, established in 1964. It is predominantly a school of science and engineering. Notable events From 2015–2018, Okayama University of Science's operator, the group Kake Gakuen, applied for ...

. He was the winner of the

Nishina Memorial Prize The is the oldest and most prestigious physics award in Japan. Information Since 1955, the Nishina Memorial Prize has been awarded annually by the Nishina Memorial Foundation. The Foundation was established to commemorate Yoshio Nishina, who ...

in 1961, and took the directorship of the

Physical Society of Japan The Physical Society of Japan (JPS; 日本物理学会 in Japanese) is the organisation of physicists in Japan. There are about 16,000 members, including university professors, researchers as well as educators, and engineers. The origins of the JPS ...

. His work with Yukata Toyozawa on impurity bands in

semiconductor A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping level ...

s has led to the Matsubara-Toyozawa model that describes the motion of an electron in a random lattice. His research interests were dielectric materials, superconductivity and superfluidity. He wrote various physics textbooks in Japanese.

References

External links

* Kotobank.j

{{DEFAULTSORT:Matsubara, Takeo 1921 births 2014 deaths Japanese physicists Academic staff of Hokkaido University Academic staff of Kyoto University Osaka University alumni Presidents of the Physical Society of Japan Scientists from Osaka