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Hendrik Antoon Lorentz's Struggle with Quantum Theory A. J
Hendrik Antoon Lorentz’s struggle with quantum theory A. J. Kox Archive for History of Exact Sciences ISSN 0003-9519 Volume 67 Number 2 Arch. Hist. Exact Sci. (2013) 67:149-170 DOI 10.1007/s00407-012-0107-8 1 23 Your article is published under the Creative Commons Attribution license which allows users to read, copy, distribute and make derivative works, as long as the author of the original work is cited. You may self- archive this article on your own website, an institutional repository or funder’s repository and make it publicly available immediately. 1 23 Arch. Hist. Exact Sci. (2013) 67:149–170 DOI 10.1007/s00407-012-0107-8 Hendrik Antoon Lorentz’s struggle with quantum theory A. J. Kox Received: 15 June 2012 / Published online: 24 July 2012 © The Author(s) 2012. This article is published with open access at Springerlink.com Abstract A historical overview is given of the contributions of Hendrik Antoon Lorentz in quantum theory. Although especially his early work is valuable, the main importance of Lorentz’s work lies in the conceptual clarifications he provided and in his critique of the foundations of quantum theory. 1 Introduction The Dutch physicist Hendrik Antoon Lorentz (1853–1928) is generally viewed as an icon of classical, nineteenth-century physics—indeed, as one of the last masters of that era. Thus, it may come as a bit of a surprise that he also made important contribu- tions to quantum theory, the quintessential non-classical twentieth-century develop- ment in physics. The importance of Lorentz’s work lies not so much in his concrete contributions to the actual physics—although some of his early work was ground- breaking—but rather in the conceptual clarifications he provided and his critique of the foundations and interpretations of the new ideas. -
Einstein's Mistakes
Einstein’s Mistakes Einstein was the greatest genius of the Twentieth Century, but his discoveries were blighted with mistakes. The Human Failing of Genius. 1 PART 1 An evaluation of the man Here, Einstein grows up, his thinking evolves, and many quotations from him are listed. Albert Einstein (1879-1955) Einstein at 14 Einstein at 26 Einstein at 42 3 Albert Einstein (1879-1955) Einstein at age 61 (1940) 4 Albert Einstein (1879-1955) Born in Ulm, Swabian region of Southern Germany. From a Jewish merchant family. Had a sister Maja. Family rejected Jewish customs. Did not inherit any mathematical talent. Inherited stubbornness, Inherited a roguish sense of humor, An inclination to mysticism, And a habit of grüblen or protracted, agonizing “brooding” over whatever was on its mind. Leading to the thought experiment. 5 Portrait in 1947 – age 68, and his habit of agonizing brooding over whatever was on its mind. He was in Princeton, NJ, USA. 6 Einstein the mystic •“Everyone who is seriously involved in pursuit of science becomes convinced that a spirit is manifest in the laws of the universe, one that is vastly superior to that of man..” •“When I assess a theory, I ask myself, if I was God, would I have arranged the universe that way?” •His roguish sense of humor was always there. •When asked what will be his reactions to observational evidence against the bending of light predicted by his general theory of relativity, he said: •”Then I would feel sorry for the Good Lord. The theory is correct anyway.” 7 Einstein: Mathematics •More quotations from Einstein: •“How it is possible that mathematics, a product of human thought that is independent of experience, fits so excellently the objects of physical reality?” •Questions asked by many people and Einstein: •“Is God a mathematician?” •His conclusion: •“ The Lord is cunning, but not malicious.” 8 Einstein the Stubborn Mystic “What interests me is whether God had any choice in the creation of the world” Some broadcasters expunged the comment from the soundtrack because they thought it was blasphemous. -
The Second-Order Correction to the Energy and Momentum in Plane Symmetric Gravitational Waves Like Spacetimes
S S symmetry Article The Second-Order Correction to the Energy and Momentum in Plane Symmetric Gravitational Waves Like Spacetimes Mutahir Ali *, Farhad Ali , Abdus Saboor, M. Saad Ghafar and Amir Sultan Khan Department of Mathematics, Kohat University of Science and Technology, Kohat 26000, Pakistan; [email protected] (F.A.); [email protected] (A.S.); [email protected] (M.S.G.); [email protected] (A.S.K.) * Correspondence: [email protected] Received: 5 December 2018; Accepted: 22 January 2019; Published: 13 February 2019 Abstract: This research provides second-order approximate Noether symmetries of geodetic Lagrangian of time-conformal plane symmetric spacetime. A time-conformal factor is of the form ee f (t) which perturbs the plane symmetric static spacetime, where e is small a positive parameter that produces perturbation in the spacetime. By considering the perturbation up to second-order in e in plane symmetric spacetime, we find the second order approximate Noether symmetries for the corresponding Lagrangian. Using Noether theorem, the corresponding second order approximate conservation laws are investigated for plane symmetric gravitational waves like spacetimes. This technique tells about the energy content of the gravitational waves. Keywords: Einstein field equations; time conformal spacetime; approximate conservation of energy 1. Introduction Gravitational waves are ripples in the fabric of space-time produced by some of the most violent and energetic processes like colliding black holes or closely orbiting black holes and neutron stars (binary pulsars). These waves travel with the speed of light and depend on their sources [1–5]. The study of these waves provide us useful information about their sources (black holes and neutron stars). -
FRACTAL STRUCTURE of the UNIVERSE. Valery Timkov, Serg Timkov, Vladimir Zhukov
FRACTAL STRUCTURE OF THE UNIVERSE. Valery Timkov, Serg Timkov, Vladimir Zhukov To cite this version: Valery Timkov, Serg Timkov, Vladimir Zhukov. FRACTAL STRUCTURE OF THE UNIVERSE.. In- ternational scientific-technical magazine: Measuring and computing devices in technological processes, Khmelnitsky national university, Khmelnitsky, Ukraine, 2016, 2 (55), pp.190 - 197. hal-01330337 HAL Id: hal-01330337 https://hal.archives-ouvertes.fr/hal-01330337 Submitted on 10 Jun 2016 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. УДК 001.5:53.02:53.05 Timkov V. F., The Office of National Security and Defense Council of Ukraine Timkov S. V., Zhukov V. A., Research and Production Enterprise «TZHK» FRACTAL STRUCTURE OF THE UNIVERSE1 Annotation It is a hypothesis about the hierarchical fractal structure of the Universe . According to the hypothesis the Universe consists of an infinite number of spatial and hierarchic fractal- spherical levels of matter that are nested within each other. In ascending order of spatial hierarchy, the following main fractals Universe that conventionally associated with the types of interactions of matter : nuclear , atomic, electromagnetic, gravitational. It can also be assumed that there exist fractals which are older than the gravitational ones. -
Ripples in Spacetime
editorial Ripples in spacetime The 2017 Nobel prize in Physics has been awarded to Rainer Weiss, Barry C. Barish and Kip S. Thorne “for decisive contributions to the LIGO detector and the observation of gravitational waves”. It is, frankly, difficult to find something original to say about the detection of gravitational waves that hasn’t been said already. The technological feat of measuring fluctuations in the fabric of spacetime less than one-thousandth the width of an atomic nucleus is quite simply astonishing. The scientific achievement represented by the confirmation of a century-old prediction by Albert Einstein is unique. And the collaborative effort that made the discovery possible — the Laser Interferometer Gravitational-Wave Observatory (LIGO) — is inspiring. Adapted from Phys. Rev. Lett. 116, 061102 (2016), under Creative Commons Licence. Rainer Weiss and Kip Thorne were, along with the late Ronald Drever, founders of the project that eventually became known Barry Barish, who was the director Last month we received a spectacular as LIGO. In the 1960s, Thorne, a black hole of LIGO from 1997 to 2005, is widely demonstration that talk of a new era expert, had come to believe that his objects of credited with transforming it into a ‘big of gravitational astronomy was no interest should be detectable as gravitational physics’ collaboration, and providing the exaggeration. Cued by detections at LIGO waves. Separately, and inspired by previous organizational structure required to ensure and Virgo, an interferometer based in Pisa, proposals, Weiss came up with the first it worked. Of course, the passion, skill and Italy, more than 70 teams of researchers calculations detailing how an interferometer dedication of the thousand or so scientists working at different telescopes around could be used to detect them in 1972. -
Booklet 2008-09.Indd
The Shaw Prize The Shaw Prize is an international award to honour individuals who are currently active in their respective fields and who have achieved distinguished and significant advances, who have made outstanding contributions in culture and the arts, or who in other domains have achieved excellence. The award is dedicated to furthering societal progress, enhancing quality of life, and enriching humanity’s spiritual civilization. Preference will be given to individuals whose significant work was recently achieved. Founder's Biographical Note The Shaw Prize was established under the auspices of Mr Run Run Shaw. Mr Shaw, born in China in 1907, is a native of Ningbo County, Zhejiang Province. He joined his brother’s film company in China in the 1920s. In the 1950s he founded the film company Shaw Brothers (Hong Kong) Limited in Hong Kong. He has been Executive Chairman of Television Broadcasts Limited in Hong Kong since the 1970s. Mr Shaw has also founded two charities, The Sir Run Run Shaw Charitable Trust and The Shaw Foundation Hong Kong, both dedicated to the promotion of education, scientific and technological research, medical and welfare services, and culture and the arts. ~ 1 ~ Message from the Chief Executive I am delighted to congratulate the six distinguished scientists who receive this year’s Shaw Prize. Their accomplishments enrich human knowledge and have a profound impact on the advancement of science. This year, the Shaw Prize recognises remarkable achievements in the areas of astronomy, life science and medicine, and mathematical sciences. The exemplary work and dedication of this year’s recipients vividly demonstrate that constant drive for excellence will eventually bear fruit. -
President's Column
AAAS Publication for the members N of the Americanewsletter Astronomical Society September/October 2010, Issue 154 CONTENTS President's Column Debra Meloy Elmegreen, [email protected] 2 Congratulations to all of us in the astronomical community on the completion of the Decadal From the Survey! Two years after the National Research Council organized the Astro2010 Committee to begin its arduous process, the report “New Worlds, New Horizons in Astronomy and Astrophysics” Executive Office is complete. In fact, as I write this article the public roll-out is underway at the Keck Center of the National Academies in Washington, DC. This was truly a community effort, and we should all be proud of it and feel ownership of it. The federal funding agencies and Congress widely view the 3 astronomy decadal process as a model for other disciplines to emulate, and it is extremely important for us to embrace it. Editor, The Astrophysical We are embarking on a period of unprecedented opportunities for astronomical research, thanks to great advances in technology, theory, and observations, and the report presents an exciting Journal Letters and balanced set of science-driven priorities within the framework of realistic budget scenarios. The Astro2010 committee comprised 23 astronomers, selected by the National Academies based on community solicitation of suggested names, who were assisted by panels on different science 4 disciplines, space- and ground-based activities, and study groups on the astronomical infrastructure; these subcommittees had a membership of nearly 200 astronomers from the US astronomical Journals Update community. The Survey report and the panel reports are the culmination of a careful and deliberate consideration of science goals, projects and missions and on the whole astronomical enterprise, based in part on the distillation of over 450 community-submitted white papers, over 100 proposals for 6 research activities, briefings from federal agencies, and 17 Town Halls, along with other federal and international reports. -
I. I. Rabi Papers [Finding Aid]. Library of Congress. [PDF Rendered Tue Apr
I. I. Rabi Papers A Finding Aid to the Collection in the Library of Congress Manuscript Division, Library of Congress Washington, D.C. 1992 Revised 2010 March Contact information: http://hdl.loc.gov/loc.mss/mss.contact Additional search options available at: http://hdl.loc.gov/loc.mss/eadmss.ms998009 LC Online Catalog record: http://lccn.loc.gov/mm89076467 Prepared by Joseph Sullivan with the assistance of Kathleen A. Kelly and John R. Monagle Collection Summary Title: I. I. Rabi Papers Span Dates: 1899-1989 Bulk Dates: (bulk 1945-1968) ID No.: MSS76467 Creator: Rabi, I. I. (Isador Isaac), 1898- Extent: 41,500 items ; 105 cartons plus 1 oversize plus 4 classified ; 42 linear feet Language: Collection material in English Location: Manuscript Division, Library of Congress, Washington, D.C. Summary: Physicist and educator. The collection documents Rabi's research in physics, particularly in the fields of radar and nuclear energy, leading to the development of lasers, atomic clocks, and magnetic resonance imaging (MRI) and to his 1944 Nobel Prize in physics; his work as a consultant to the atomic bomb project at Los Alamos Scientific Laboratory and as an advisor on science policy to the United States government, the United Nations, and the North Atlantic Treaty Organization during and after World War II; and his studies, research, and professorships in physics chiefly at Columbia University and also at Massachusetts Institute of Technology. Selected Search Terms The following terms have been used to index the description of this collection in the Library's online catalog. They are grouped by name of person or organization, by subject or location, and by occupation and listed alphabetically therein. -
Programm 2012 Swiss Biennial
9. SCHWEIZER BIENNALE ZU WISSENSCHAFT, TECHNIK + ÄSTHETIK THE 9TH SWISS BIENNIAL ON SCIENCE, TECHNICS + AESTHETICS TOPIC 2012: DAS GROSSE, DAS KLEINE UND DER MENSCHLICHE GEIST – TEIL 2 TOPIC 2012: THE LARGE, THE SMALL AND THE HUMAN MIND – PART 2 Verkehrshaus der Schweiz, Luzern, Schweiz, 31. März – 1. April 2012 Swiss Museum of Transport, Lucerne, Switzerland, March 31 – April 1, 2012 Veranstalter – Organizer: Neue Galerie Luzern / New Gallery Lucerne www.neugalu.ch Programm – Program Samstag, 31. März 2012 – Saturday, March 31, 2012 12.00 - 12.15 Begrüssung – Welcome Address, Programmüberblick – Presentation of Program René Stettler, Gründer Schweizer Biennale zu Wissenschaft, Technik + Ästhetik – Founder, Swiss Biennial on Science, Technics + Aesthetics Keynote 12.15 - 13.00 ROGER PENROSE Mathematische Physik und Kosmologie Oxford – UK Autor von “Cycles of Time: An Extraordinary New View of the Universe” (2010), “The Road to Reality – Der Weg zur Wirklichkeit” (2004), “Shadows of the Mind – Schatten des Geistes” (1994) ON THE MYSTERIOUS BRIDGE FROM QUANTUM TO CLASSICAL, AND ITS ROLE IN CONSCIOUS MENTALITY – ZUR MYSTERIÖSEN BRÜCKE ZWISCHEN DER QUANTEN- UND DER KLASSISCHEN WELT UND IHRE ROLLE IN DER BEWUSSTEN MENTALITÄT 13.00 - 13.10 Diskussion – Discussion Leitung – Chair STUART HAMEROFF Anästhesiologie Tucson – USA Keynote 13.10 - 13.40 STUART HAMEROFF Anästhesiologie Tucson – USA Autor von “Consciousness in the universe? – Neuroscience, quantum space-time geometry and Orch OR theory (2011, Paper) mit/with Roger Penrose, “The Brain is both neurocomputer and quantum computer” (2007, Paper), “Quantum computation in brain microtubules? – The Penrose-Hameroff ‘Orch OR’ model of consciousness” (1998, Paper) PENROSE–HAMEROFF ORCH OR THEORY. CURRENT STATUS, CRITICISMS AND FUTURE DIRECTIONS – DIE PENROSE/HAMEROFF ORCH OR THEORIE. -
The Galactic Center: a Laboratory for Fundamental Astrophysics And
The Galactic Center: A Laboratory for Fundamental Astrophysics and Galactic Nuclei An Astro2010 Science White Paper Authors: Andrea Ghez (UCLA; [email protected]), Mark Morris (UCLA), Jessica Lu (Caltech), Nevin Weinberg (UCB), Keith Matthews (Caltech), Tal Alexander (Weizmann Inst.), Phil Armitage (U. of Colorado), Eric Becklin (Ames/UCLA), Warren Brown (CfA), Randy Campbell (Keck) Tuan Do (UCLA), Andrea Eckart (U. of Cologne), Reinhard Genzel (MPE/UCB), Andy Gould (Ohio State), Brad Hansen (UCLA), Luis Ho (Carnegie), Fred Lo (NRAO), Avi Loeb (Harvard), Fulvio Melia (U. of Arizona), David Merritt (RIT), Milos Milosavljevic (U. of Texas), Hagai Perets (Weizmann Inst.), Fred Rasio (Northwestern), Mark Reid (CfA), Samir Salim (NOAO), Rainer Sch¨odel (IAA), Sylvana Yelda (UCLA) Submitted to Science Frontier Panels on (1) The Galactic Neighborhood (GAN) arXiv:0903.0383v1 [astro-ph.GA] 2 Mar 2009 (2) Cosmology and Fundamental Physics (CFP) Supplemental Animations: http://www.astro.ucla.edu/∼ghezgroup/gc/pictures/Future GCorbits.shtml Galactic Center Stellar Dynamics Astro2010 White Paper 1 Abstract As the closest example of a galactic nucleus, the Galactic center presents an exquisite lab- oratory for learning about supermassive black holes (SMBH) and their environs. In this document, we describe how detailed studies of stellar dynamics deep in the potential well of a galaxy offer several exciting directions in the coming decade. First, it will be possible to obtain precision measurements of the Galaxy’s central potential, providing both a unique test of General Relativity (GR) and a detection of the extended dark matter distribution that is predicted to exist around the SMBH. Tests of gravity have not previously been pos- sible on scales larger than our solar system, or in regimes where the gravitational energy of a body is >∼1% of its rest mass energy. -
Recent Observations of Gravitational Waves by LIGO and Virgo Detectors
universe Review Recent Observations of Gravitational Waves by LIGO and Virgo Detectors Andrzej Królak 1,2,* and Paritosh Verma 2 1 Institute of Mathematics, Polish Academy of Sciences, 00-656 Warsaw, Poland 2 National Centre for Nuclear Research, 05-400 Otwock, Poland; [email protected] * Correspondence: [email protected] Abstract: In this paper we present the most recent observations of gravitational waves (GWs) by LIGO and Virgo detectors. We also discuss contributions of the recent Nobel prize winner, Sir Roger Penrose to understanding gravitational radiation and black holes (BHs). We make a short introduction to GW phenomenon in general relativity (GR) and we present main sources of detectable GW signals. We describe the laser interferometric detectors that made the first observations of GWs. We briefly discuss the first direct detection of GW signal that originated from a merger of two BHs and the first detection of GW signal form merger of two neutron stars (NSs). Finally we present in more detail the observations of GW signals made during the first half of the most recent observing run of the LIGO and Virgo projects. Finally we present prospects for future GW observations. Keywords: gravitational waves; black holes; neutron stars; laser interferometers 1. Introduction The first terrestrial direct detection of GWs on 14 September 2015, was a milestone Citation: Kro´lak, A.; Verma, P. discovery, and it opened up an entirely new window to explore the universe. The combined Recent Observations of Gravitational effort of various scientists and engineers worldwide working on the theoretical, experi- Waves by LIGO and Virgo Detectors. -
MATTERS of GRAVITY, a Newsletter for the Gravity Community, Number 3
MATTERS OF GRAVITY Number 3 Spring 1994 Table of Contents Editorial ................................................... ................... 2 Correspondents ................................................... ............ 2 Gravity news: Open Letter to gravitational physicists, Beverly Berger ........................ 3 A Missouri relativist in King Gustav’s Court, Clifford Will .................... 6 Gary Horowitz wins the Xanthopoulos award, Abhay Ashtekar ................ 9 Research briefs: Gamma-ray bursts and their possible cosmological implications, Peter Meszaros 12 Current activity and results in laboratory gravity, Riley Newman ............. 15 Update on representations of quantum gravity, Donald Marolf ................ 19 Ligo project report: December 1993, Rochus E. Vogt ......................... 23 Dark matter or new gravity?, Richard Hammond ............................. 25 Conference Reports: Gravitational waves from coalescing compact binaries, Curt Cutler ........... 28 Mach’s principle: from Newton’s bucket to quantum gravity, Dieter Brill ..... 31 Cornelius Lanczos international centenary conference, David Brown .......... 33 Third Midwest relativity conference, David Garfinkle ......................... 36 arXiv:gr-qc/9402002v1 1 Feb 1994 Editor: Jorge Pullin Center for Gravitational Physics and Geometry The Pennsylvania State University University Park, PA 16802-6300 Fax: (814)863-9608 Phone (814)863-9597 Internet: [email protected] 1 Editorial Well, this newsletter is growing into its third year and third number with a lot of strength. In fact, maybe too much strength. Twelve articles and 37 (!) pages. In this number, apart from the ”traditional” research briefs and conference reports we also bring some news for the community, therefore starting to fulfill the original promise of bringing the gravity/relativity community closer together. As usual I am open to suggestions, criticisms and proposals for articles for the next issue, due September 1st. Many thanks to the authors and the correspondents who made this issue possible.