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Wolfgang Pauli Niels Bohr Paul Dirac Max Planck Richard Feynman
Wolfgang Pauli Niels Bohr Paul Dirac Max Planck Richard Feynman Louis de Broglie Norman Ramsey Willis Lamb Otto Stern Werner Heisenberg Walther Gerlach Ernest Rutherford Satyendranath Bose Max Born Erwin Schrödinger Eugene Wigner Arnold Sommerfeld Julian Schwinger David Bohm Enrico Fermi Albert Einstein Where discovery meets practice Center for Integrated Quantum Science and Technology IQ ST in Baden-Württemberg . Introduction “But I do not wish to be forced into abandoning strict These two quotes by Albert Einstein not only express his well more securely, develop new types of computer or construct highly causality without having defended it quite differently known aversion to quantum theory, they also come from two quite accurate measuring equipment. than I have so far. The idea that an electron exposed to a different periods of his life. The first is from a letter dated 19 April Thus quantum theory extends beyond the field of physics into other 1924 to Max Born regarding the latter’s statistical interpretation of areas, e.g. mathematics, engineering, chemistry, and even biology. beam freely chooses the moment and direction in which quantum mechanics. The second is from Einstein’s last lecture as Let us look at a few examples which illustrate this. The field of crypt it wants to move is unbearable to me. If that is the case, part of a series of classes by the American physicist John Archibald ography uses number theory, which constitutes a subdiscipline of then I would rather be a cobbler or a casino employee Wheeler in 1954 at Princeton. pure mathematics. Producing a quantum computer with new types than a physicist.” The realization that, in the quantum world, objects only exist when of gates on the basis of the superposition principle from quantum they are measured – and this is what is behind the moon/mouse mechanics requires the involvement of engineering. -
Sterns Lebensdaten Und Chronologie Seines Wirkens
Sterns Lebensdaten und Chronologie seines Wirkens Diese Chronologie von Otto Sterns Wirken basiert auf folgenden Quellen: 1. Otto Sterns selbst verfassten Lebensläufen, 2. Sterns Briefen und Sterns Publikationen, 3. Sterns Reisepässen 4. Sterns Züricher Interview 1961 5. Dokumenten der Hochschularchive (17.2.1888 bis 17.8.1969) 1888 Geb. 17.2.1888 als Otto Stern in Sohrau/Oberschlesien In allen Lebensläufen und Dokumenten findet man immer nur den VornamenOt- to. Im polizeilichen Führungszeugnis ausgestellt am 12.7.1912 vom königlichen Polizeipräsidium Abt. IV in Breslau wird bei Stern ebenfalls nur der Vorname Otto erwähnt. Nur im Emeritierungsdokument des Carnegie Institutes of Tech- nology wird ein zweiter Vorname Otto M. Stern erwähnt. Vater: Mühlenbesitzer Oskar Stern (*1850–1919) und Mutter Eugenie Stern geb. Rosenthal (*1863–1907) Nach Angabe von Diana Templeton-Killan, der Enkeltochter von Berta Kamm und somit Großnichte von Otto Stern (E-Mail vom 3.12.2015 an Horst Schmidt- Böcking) war Ottos Großvater Abraham Stern. Abraham hatte 5 Kinder mit seiner ersten Frau Nanni Freund. Nanni starb kurz nach der Geburt des fünften Kindes. Bald danach heiratete Abraham Berta Ben- der, mit der er 6 weitere Kinder hatte. Ottos Vater Oskar war das dritte Kind von Berta. Abraham und Nannis erstes Kind war Heinrich Stern (1833–1908). Heinrich hatte 4 Kinder. Das erste Kind war Richard Stern (1865–1911), der Toni Asch © Springer-Verlag GmbH Deutschland 2018 325 H. Schmidt-Böcking, A. Templeton, W. Trageser (Hrsg.), Otto Sterns gesammelte Briefe – Band 1, https://doi.org/10.1007/978-3-662-55735-8 326 Sterns Lebensdaten und Chronologie seines Wirkens heiratete. -
Wien Peaks, Planck Distribution Function and Its Decomposition, The
Applied Physics Research; Vol. 12, No. 4; 2020 ISSN 1916-9639 E-ISSN 1916-9647 Published by Canadian Center of Science and Education How to Understand the Planck´s Oscillators? Wien Peaks, Planck Distribution Function and Its Decomposition, the Bohm Sheath Criterion, Plasma Coupling Constant, the Barrier of Determinacy, Hubble Cooling Constant. (24.04.2020) Jiří Stávek1 1 Bazovského 1228, 163 00 Prague, Czech republic Correspondence: Jiří Stávek, Bazovského 1228, 163 00 Prague, Czech republic. E-mail: [email protected] Received: April 23, 2020 Accepted: June 26, 2020 Online Published: July 31, 2020 doi:10.5539/apr.v12n4p63 URL: http://dx.doi.org/10.5539/apr.v12n4p63 Abstract In our approach we have combined knowledge of Old Masters (working in this field before the year 1905), New Masters (working in this field after the year 1905) and Dissidents under the guidance of Louis de Broglie and David Bohm. Based on the great works of Wilhelm Wien and Max Planck we have presented a new look on the “Wien Peaks” and the Planck Distribution Function and proposed the “core-shell” model of the photon. There are known many “Wien Peaks” defined for different contexts. We have introduced a thermodynamic approach to define the Wien Photopic Peak at the wavelength λ = 555 nm and the Wien Scotopic Peak at the wavelength λ = 501 nm to document why Nature excellently optimized the human vision at those wavelengths. There could be discovered many more the so-called Wien Thermodynamic Peaks for other physical and chemical processes. We have attempted to describe the so-called Planck oscillators as coupled oscillations of geons and dyons. -
Otto Stern Annalen 4.11.11
(To be published by Annalen der Physik in December 2011) Otto Stern (1888-1969): The founding father of experimental atomic physics J. Peter Toennies,1 Horst Schmidt-Böcking,2 Bretislav Friedrich,3 Julian C.A. Lower2 1Max-Planck-Institut für Dynamik und Selbstorganisation Bunsenstrasse 10, 37073 Göttingen 2Institut für Kernphysik, Goethe Universität Frankfurt Max-von-Laue-Strasse 1, 60438 Frankfurt 3Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6, 14195 Berlin Keywords History of Science, Atomic Physics, Quantum Physics, Stern- Gerlach experiment, molecular beams, space quantization, magnetic dipole moments of nucleons, diffraction of matter waves, Nobel Prizes, University of Zurich, University of Frankfurt, University of Rostock, University of Hamburg, Carnegie Institute. We review the work and life of Otto Stern who developed the molecular beam technique and with its aid laid the foundations of experimental atomic physics. Among the key results of his research are: the experimental test of the Maxwell-Boltzmann distribution of molecular velocities (1920), experimental demonstration of space quantization of angular momentum (1922), diffraction of matter waves comprised of atoms and molecules by crystals (1931) and the determination of the magnetic dipole moments of the proton and deuteron (1933). 1 Introduction Short lists of the pioneers of quantum mechanics featured in textbooks and historical accounts alike typically include the names of Max Planck, Albert Einstein, Arnold Sommerfeld, Niels Bohr, Max von Laue, Werner Heisenberg, Erwin Schrödinger, Paul Dirac, Max Born, and Wolfgang Pauli on the theory side, and of Wilhelm Conrad Röntgen, Ernest Rutherford, Arthur Compton, and James Franck on the experimental side. However, the records in the Archive of the Nobel Foundation as well as scientific correspondence, oral-history accounts and scientometric evidence suggest that at least one more name should be added to the list: that of the “experimenting theorist” Otto Stern. -
Persecution and Escape: Professional Networks and High-Skilled Emigration from Nazi Germany
Discussion Paper Series CDP 05/21 Persecution and Escape: Professional Networks and High-Skilled Emigration from Nazi Germany Sascha O. Becker, Volker Lindenthal, Sharun Mukand, and Fabian Waldinger Centre for Research and Analysis of Migration Department of Economics, University College London Drayton House, 30 Gordon Street, London WC1H 0AX www.cream-migration.org Persecution and Escape: Professional Networks and High-Skilled Emigration from Nazi Germany∗ Sascha O. Becker Volker Lindenthal Monash U and U Warwick University of Munich Sharun Mukand Fabian Waldinger University of Warwick University of Munich March 2021 Abstract We study the role of professional networks in facilitating the escape of persecuted academics from Nazi Germany. From 1933, the Nazi regime started to dismiss academics of Jewish origin from their positions. The timing of dismissals created individual-level exogenous variation in the timing of emigration from Nazi Germany, allowing us to estimate the causal eect of networks for emigration decisions. Academics with ties to more colleagues who had emigrated in 1933 or 1934 (early émigrés) were more likely to emigrate. The early émigrés functioned as “bridging nodes” that helped other academics cross over to their destination. Furthermore, we provide some of the rst empirical evidence of decay in social ties over time. The strength of ties also decays across space, even within cities. Finally, for high-skilled migrants, professional networks are more important than community networks. ∗Becker: [email protected], Lindenthal: [email protected], Mukand: [email protected], Waldinger: [email protected]. We thank Paul N. Courant, Luis Cande- laria, Clement De Chaisemartin, Sybille Gerstengarbe, Dean Karlan, Paul Klemperer, James Kai-Sing Kung, Susanna Loeb, Andras Simonovits, Nico Voigtländer, Alina Yue Wang, and Yves Zenou for very insightful comments and conversations. -
Max Planck Institute for the History of Science Werner Heisenberg And
MAX-PLANCK-INSTITUT FÜR WISSENSCHAFTSGESCHICHTE Max Planck Institute for the History of Science PREPRINT 203 (2002) Horst Kant Werner Heisenberg and the German Uranium Project Otto Hahn and the Declarations of Mainau and Göttingen Werner Heisenberg and the German Uranium Project* Horst Kant Werner Heisenberg’s (1901-1976) involvement in the German Uranium Project is the most con- troversial aspect of his life. The controversial discussions on it go from whether Germany at all wanted to built an atomic weapon or only an energy supplying machine (the last only for civil purposes or also for military use for instance in submarines), whether the scientists wanted to support or to thwart such efforts, whether Heisenberg and the others did really understand the mechanisms of an atomic bomb or not, and so on. Examples for both extreme positions in this controversy represent the books by Thomas Powers Heisenberg’s War. The Secret History of the German Bomb,1 who builds up him to a resistance fighter, and by Paul L. Rose Heisenberg and the Nazi Atomic Bomb Project – A Study in German Culture,2 who characterizes him as a liar, fool and with respect to the bomb as a poor scientist; both books were published in the 1990s. In the first part of my paper I will sum up the main facts, known on the German Uranium Project, and in the second part I will discuss some aspects of the role of Heisenberg and other German scientists, involved in this project. Although there is already written a lot on the German Uranium Project – and the best overview up to now supplies Mark Walker with his book German National Socialism and the quest for nuclear power, which was published in * Paper presented on a conference in Moscow (November 13/14, 2001) at the Institute for the History of Science and Technology [àÌÒÚËÚÛÚ ËÒÚÓËË ÂÒÚÂÒÚ‚ÓÁ̇ÌËfl Ë ÚÂıÌËÍË ËÏ. -
Lise Meitner 1878 – 1968
Discoveries that changed the world: 1932 – 1942 James Chadwick 1891 – 1974 Lise Meitner 1878 – 1968 I „The road to the neutron“ Staff and research students at the Cavendish Laboratory, Cambridge, 1923. (Names from left to right. Front row: J. Chadwick, G. Stead, F.W. Aston, Prof. Sir J. J. Thomson, Prof. Sir E. Rutherford, J.A. Crowther, Miss B. Trevelyan, G.I. Taylor, Second row: P. Kapitza, H. de W. Smyth, T. Alty, J.E. Crackston, H. Robinson, L.F. Curtiss, E.S. Bieler, A.G.D. West, P. Mercier. Back row: P.M.S. Blackett, R.E. Clay, H.W.B. Skinner, H.D. Griffith, A.W. Barton, L.F. Bates, J.S. Rogers, K.G. Emeleus.) The room which Rutherford and Chadwick used for their scattering experiments in the 1920s. The work was carried out in the dark, often to the accompaniment of Rutherford singing „Onward Christian Soldiers“. Rutherford had already proposed the neutron in 1920 in his Bakerian Lecture at the Royal Society. He talked about a “neutral doublet” (at that time considered a proton and electron) that could be difficult to detect and move easily through matter. Curie & Joliot published (incorrectly) in Jan. 1932 the observation: 9Be + 4He → 12C + 1n I. Curie and F. Joliot, C. R. Acad. Sci. Paris 194, 273 (1932) When the radiation was passed through wax the ionisation increased! This increase was due to knock-on protons. To explain this the Curie’s suggested that the emission was of a 55 MeV γ ray, an energy much greater than anything yet seen! Moreover, the radiation also passed through lead This experiment was first performed in 1930 by Walter Bothe and Herbet Becker at U. -
Heisenberg and the Nazi Atomic Bomb Project, 1939-1945: a Study in German Culture
Heisenberg and the Nazi Atomic Bomb Project http://content.cdlib.org/xtf/view?docId=ft838nb56t&chunk.id=0&doc.v... Preferred Citation: Rose, Paul Lawrence. Heisenberg and the Nazi Atomic Bomb Project, 1939-1945: A Study in German Culture. Berkeley: University of California Press, c1998 1998. http://ark.cdlib.org/ark:/13030/ft838nb56t/ Heisenberg and the Nazi Atomic Bomb Project A Study in German Culture Paul Lawrence Rose UNIVERSITY OF CALIFORNIA PRESS Berkeley · Los Angeles · Oxford © 1998 The Regents of the University of California In affectionate memory of Brian Dalton (1924–1996), Scholar, gentleman, leader, friend And in honor of my father's 80th birthday Preferred Citation: Rose, Paul Lawrence. Heisenberg and the Nazi Atomic Bomb Project, 1939-1945: A Study in German Culture. Berkeley: University of California Press, c1998 1998. http://ark.cdlib.org/ark:/13030/ft838nb56t/ In affectionate memory of Brian Dalton (1924–1996), Scholar, gentleman, leader, friend And in honor of my father's 80th birthday ― ix ― ACKNOWLEDGMENTS For hospitality during various phases of work on this book I am grateful to Aryeh Dvoretzky, Director of the Institute of Advanced Studies of the Hebrew University of Jerusalem, whose invitation there allowed me to begin work on the book while on sabbatical leave from James Cook University of North Queensland, Australia, in 1983; and to those colleagues whose good offices made it possible for me to resume research on the subject while a visiting professor at York University and the University of Toronto, Canada, in 1990–92. Grants from the College of the Liberal Arts and the Institute for the Arts and Humanistic Studies of The Pennsylvania State University enabled me to complete the research and writing of the book. -
ABSTRACT Title of Dissertation: the PRINCIPAL UNCERTAINTY: U.S
ABSTRACT Title of Dissertation: THE PRINCIPAL UNCERTAINTY: U.S. ATOMIC INTELLIGENCE, 1942-1949 Vincent Jonathan Houghton, Doctor of Philosophy, 2013 Dissertation directed by: Professor Jon T. Sumida Department of History The subject of this dissertation is the U. S. atomic intelligence effort against both Nazi Germany and the Soviet Union in the period 1942-1949. Both of these intelligence efforts operated within the framework of an entirely new field of intelligence: scientific intelligence. Because of the atomic bomb, for the first time in history a nation’s scientific resources – the abilities of its scientists, the state of its research institutions and laboratories, its scientific educational system – became a key consideration in assessing a potential national security threat. Considering how successfully the United States conducted the atomic intelligence effort against the Germans in the Second World War, why was the United States Government unable to create an effective atomic intelligence apparatus to monitor Soviet scientific and nuclear capabilities? Put another way, why did the effort against the Soviet Union fail so badly, so completely, in all potential metrics – collection, analysis, and dissemination? In addition, did the general assessment of German and Soviet science lead to particular assumptions about their abilities to produce nuclear weapons? How did this assessment affect American presuppositions regarding the German and Soviet strategic threats? Despite extensive historical work on atomic intelligence, the current historiography has not adequately addressed these questions. THE PRINCIPAL UNCERTAINTY: U.S. ATOMIC INTELLIGENCE, 1942-1949 By Vincent Jonathan Houghton Dissertation submitted to the Faculty of the Graduate School of the University of Maryland, College Park, in partial fulfillment of the requirements for the degree of Doctor of Philosophy 2013 Advisory Committee: Professor Jon T. -
Guide to the James Franck Papers 1882-1966
University of Chicago Library Guide to the James Franck Papers 1882-1966 © 2006 University of Chicago Library Table of Contents Acknowledgments 3 Descriptive Summary 3 Information on Use 3 Access 3 Citation 3 Biographical Note 4 Scope Note 15 Related Resources 21 Subject Headings 21 INVENTORY 22 Series I: Correspondence 22 Series II: Manuscripts 51 Subseries 1: Physics - work in Germany and Denmark, 1905-1934 51 Subseries 2: Physics - work in United States, 1935-1958 53 Subseries 3: Biophysics - work on Photosynthesis at Johns Hopkins, 1935-193855 Subseries 4: Biophysics - work on Photosynthesis at the University of Chicago,55 1938-48 Subseries 5: Biophysics - work on Photosynthesis after 1948 55 Subseries 6: General Articles and Talks on Science 71 Subseries 7: Papers by other scientists 72 Subseries 8: Notes, memoranda and fragments 76 Subseries 9: Atomic Scientists' Movement, 1944-1953 76 Subseries 10: Franck Memorial Symposium, May 12-13, 1966 79 Series III: Tape Recordings and Photographs 80 Subseries 1: Tape recordings 80 Subseries 2: Hertha Sponer's photograph album, Göttingen, 1920-1933 80 Series IV: Personal Documents and Memorabilia 90 Subseries 1: Documents 90 Subseries 2: Clippings 93 Subseries 3: Biographies and Obituaries 94 Subseries 4: Memorabilia; Scrolls, Certificates, Medals, Mementos 96 Series V: Robert Platzman's Editorial Papers for the "Selected Works of James98 Franck" Series VI: Addenda 103 Subseries 1: Correspondence between James Franck and his nephew and Dr. Heinz104 Kallman Subseries 2: Oversize 105 Descriptive Summary Identifier ICU.SPCL.FRANCK Title Franck, James. Papers Date 1882-1966 Size 20.5 linear feet (29 boxes) Repository Special Collections Research Center University of Chicago Library 1100 East 57th Street Chicago, Illinois 60637 U.S.A. -
Otto Stern Annalen 22.9.11
September 22, 2011 Otto Stern (1888-1969): The founding father of experimental atomic physics J. Peter Toennies,1 Horst Schmidt-Böcking,2 Bretislav Friedrich,3 Julian C.A. Lower2 1Max-Planck-Institut für Dynamik und Selbstorganisation Bunsenstrasse 10, 37073 Göttingen 2Institut für Kernphysik, Goethe Universität Frankfurt Max-von-Laue-Strasse 1, 60438 Frankfurt 3Fritz-Haber-Institut der Max-Planck-Gesellschaft Faradayweg 4-6, 14195 Berlin Keywords History of Science, Atomic Physics, Quantum Physics, Stern- Gerlach experiment, molecular beams, space quantization, magnetic dipole moments of nucleons, diffraction of matter waves, Nobel Prizes, University of Zurich, University of Frankfurt, University of Rostock, University of Hamburg, Carnegie Institute. We review the work and life of Otto Stern who developed the molecular beam technique and with its aid laid the foundations of experimental atomic physics. Among the key results of his research are: the experimental determination of the Maxwell-Boltzmann distribution of molecular velocities (1920), experimental demonstration of space quantization of angular momentum (1922), diffraction of matter waves comprised of atoms and molecules by crystals (1931) and the determination of the magnetic dipole moments of the proton and deuteron (1933). 1 Introduction Short lists of the pioneers of quantum mechanics featured in textbooks and historical accounts alike typically include the names of Max Planck, Albert Einstein, Arnold Sommerfeld, Niels Bohr, Werner Heisenberg, Erwin Schrödinger, Paul Dirac, Max Born, and Wolfgang Pauli on the theory side, and of Konrad Röntgen, Ernest Rutherford, Max von Laue, Arthur Compton, and James Franck on the experimental side. However, the records in the Archive of the Nobel Foundation as well as scientific correspondence, oral-history accounts and scientometric evidence suggest that at least one more name should be added to the list: that of the “experimenting theorist” Otto Stern. -
Sir Arthur Eddington and the Foundations of Modern Physics
Sir Arthur Eddington and the Foundations of Modern Physics Ian T. Durham Submitted for the degree of PhD 1 December 2004 University of St. Andrews School of Mathematics & Statistics St. Andrews, Fife, Scotland 1 Dedicated to Alyson Nate & Sadie for living through it all and loving me for being you Mom & Dad my heroes Larry & Alice Sharon for constant love and support for everything said and unsaid Maggie for making 13 a lucky number Gram D. Gram S. for always being interested for strength and good food Steve & Alice for making Texas worth visiting 2 Contents Preface … 4 Eddington’s Life and Worldview … 10 A Philosophical Analysis of Eddington’s Work … 23 The Roaring Twenties: Dawn of the New Quantum Theory … 52 Probability Leads to Uncertainty … 85 Filling in the Gaps … 116 Uniqueness … 151 Exclusion … 185 Numerical Considerations and Applications … 211 Clarity of Perception … 232 Appendix A: The Zoo Puzzle … 268 Appendix B: The Burying Ground at St. Giles … 274 Appendix C: A Dialogue Concerning the Nature of Exclusion and its Relation to Force … 278 References … 283 3 I Preface Albert Einstein’s theory of general relativity is perhaps the most significant development in the history of modern cosmology. It turned the entire field of cosmology into a quantitative science. In it, Einstein described gravity as being a consequence of the geometry of the universe. Though this precise point is still unsettled, it is undeniable that dimensionality plays a role in modern physics and in gravity itself. Following quickly on the heels of Einstein’s discovery, physicists attempted to link gravity to the only other fundamental force of nature known at that time: electromagnetism.