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|religion = Judaism |footnotes = |signature = }} Walter Heinrich Heitler (; 2 January 1904 – 15 November 1981) was a German physicist who made contributions to quantum electrodynamics and quantum field theory. He brought chemistry under quantum mechanics through his theory of valence bonding. ==Education== In 1922, Heitler began his study of physics at the Karlsruhe Technische Hochschule, in 1923 at the Humboldt University of Berlin, and in 1924 at the Ludwig Maximilians University of Munich (LMU), where he studied under both Arnold Sommerfeld and Karl Herzfeld. The latter was his thesis advisor when he obtained his doctorate in 1926;〔 – Dr. phil. Ludwig-Maximilians-Universität München. 1926 Dissertation title: ''Zur Theorie konzentrierter Lösungen''.〕 Herzfeld taught courses in theoretical physics and one in physical chemistry, and in Sommerfeld's absence often took over his classes.〔(Karl Herzfeld )〕 From 1926 to 1927, he was a Rockefeller Foundation Fellow for postgraduate research with Niels Bohr at the Institute for Theoretical Physics at the University of Copenhagen and with Erwin Schrödinger at the University of Zurich. He then became an assistant to Max Born at the Institute for Theoretical Physics at the Georg-August University of Göttingen. Heitler completed his Habilitation, under Born, in 1929, and then remained as a Privatdozent until 1933.〔(Author Catalog: Heitler ) – American Philosophical Society〕 In that year, he was let go by the university because he was Jewish.〔(Uta Schäfer-Richter, Jörg Klein (1992), p. 93 )〕 At the time Heitler received his doctorate, three Institutes for Theoretical Physics formed a consortium which worked on the key problems of the day, such as atomic and molecular structure, and exchanged both scientific information and personnel in their scientific quests. These institutes were located at the LMU, under Arnold Sommerfeld, the University of Göttingen, under Max Born, and the University of Copenhagen, under Niels Bohr. Furthermore, Werner Heisenberg and Born had just recently published their trilogy of papers which launched the matrix mechanics formulation of quantum mechanics.〔W. Heisenberg, ''Über quantentheoretische Umdeutung kinematischer und mechanischer Beziehungen'', ''Zeitschrift für Physik'' 33 879-893, 1925 (received July 29, 1925). (translation in: B. L. van der Waerden, editor, ''Sources of Quantum Mechanics'' (Dover Publications, 1968) ISBN 0-486-61881-1 (English title: ''Quantum-Theoretical Re-interpretation of Kinematic and Mechanical Relations''). )〕〔M. Born and P. Jordan, ''Zur Quantenmechanik'', ''Zeitschrift für Physik'' 34 858-888, 1925 (received September 27, 1925). (translation in: B. L. van der Waerden, editor, ''Sources of Quantum Mechanics'' (Dover Publications, 1968) ISBN 0-486-61881-1 )〕〔M. Born, W. Heisenberg, and P. Jordan, ''Zur Quantenmechanik II'', ''Zeitschrift für Physik'' 35 557-615, 1925 (received November, 1925). (translation in: B. L. van der Waerden, editor, ''Sources of Quantum Mechanics'' (Dover Publications, 1968) ISBN 0-486-61881-1 )〕 Also, in early 1926, Erwin Schrödinger, at the University of Zurich, began to publish his quintet of papers which launched the wave mechanics formulation of quantum mechanics〔Erwin Schrödinger ''(From the German) Quantization as an Eigenvalue Problem (First Communication)'', ''Annalen der Physik'' 79 (4) 361-376, 1926. (translation in Gunter Ludwig ''Wave Mechanics'' 94-105 (Pergamon Press, 1968) ISBN 0-08-203204-1 )〕〔Erwin Schrödinger ''(From the German) Quantization as an Eigenvalue Problem (Second Communication)'', ''Annalen der Physik'' 79 (6) 489-527, 1926. (translation in Gunter Ludwig ''Wave Mechanics'' 106-126 (Pergamon Press, 1968) ISBN 0-08-203204-1 )〕〔Erwin Schrödinger ''(From the German) Quantization as an Eigenvalue Problem (Third Communication)'', ''Annalen der Physik'' 80 (13) 437-490, 1926.〕〔Erwin Schrödinger ''(From the German) Quantization as an Eigenvalue Problem (Fourth Communication)'', ''Annalen der Physik'' 81 (18) 109-139, 1926. (translation in Gunter Ludwig ''Wave Mechanics'' 151-167 (Pergamon Press, 1968) ISBN 0-08-203204-1 )〕 and showed that the wave mechanics and matrix mechanics formulations were equivalent.〔Erwin Schrödinger ''(From the German) On the Relationship of the Heisenberg-Born-Jordan Quantum Mechanics to Mine'', ''Annalen der Physik'' 79 (8) 734-756, 1926. (translation in Gunter Ludwig ''Wave Mechanics'' 127-150 (Pergamon Press, 1968) ISBN 0-08-203204-1 )〕 These papers immediately put the personnel at the leading theoretical physics institutes onto applying these new tools to understanding atomic and molecular structure. It was in this environment that Heitler went on his Rockefeller Foundations Fellowship, leaving LMU and within a period of two years going to do research and study with the leading figures of the day in theoretical physics, Bohr's personnel in Copenhagen, Schrödinger in Zurich, and Born in Göttingen. In Zurich, with Fritz London, Heitler applied the new quantum mechanics to deal with the saturable, nondynamic forces of attraction and repulsion, i.e., exchange forces, of the hydrogen molecule. Their valence bond treatment of this problem,〔Walter Heitler and Fritz London ''Wechselwirkung neutraler Atome und homöopolare Bindung nach der Quantenmechanik'', ''Zeitschrift für Physik'' 44 (1927) 455-472.〕 was a landmark in that it brought chemistry under quantum mechanics. Furthermore, their work greatly influenced chemistry through Linus Pauling, who had just received his doctorate and on a Guggenheim Fellowship visited Heitler and London in Zurich, as Pauling spent much of his career studying the nature of the chemical bond. The application of quantum mechanics to chemistry would be a prominent theme in Heitler's career.〔Mehra, Volume 5, Part 1, 2001, p. 312.〕〔(Pauling ) – Oregon State University〕〔Jammer, 1966, p. 343.〕 While Heitler was at Göttingen, Adolf Hitler came to power in 1933. With the rising prominence of anti-Semitism under Hitler, Born took it upon himself to take the younger Jewish generation under his wing.〔The younger generation of Jewish physicists included Walter Heitler, Lothar Nordheim, Fritz London, and Edward Teller. See Greenspan, 2005, p. 183.〕 In doing so, Born arranged for Heitler to get a position that year as a Research Fellow at the University of Bristol, with Nevill Francis Mott.〔Greenspan, 2005, p. 183.〕〔(Mott ) – Bristol Physics in the 1930s〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Walter Heitler」の詳細全文を読む スポンサード リンク
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