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Solid State Physics 2 Lecture 4: Magnetism in Charge Insulators
Physics 7450: Solid State Physics 2 Lecture 4: Magnetism in charge insulators Leo Radzihovsky (Dated: 19 February, 2015) Abstract In these lectures, we will study magnetism in insulators. After a warm up with paramagnetism of independent spins, we will discuss the spin exchange interactions in solids, arising from the combination of Coulomb repulsion and Pauli exclusion, and leads to the Heisenberg model of magnetism. Focussing on the simplest ferromagnetic and antiferromagnetic states, we will analyze thermodynamics and correlations of low-energy excitations around these states using Holstein- Primakoff and Schwinger bosons descriptions. We will use Jordan-Wigner transformation to solve a one-dimensional spin-1/2 chain. We will discuss coherent-spin states path-integral formulation of magnetism emphasizing, the role of Berry’s phase and will analyze phase transitions using Landau’s mean-field theory of FM and AFM phases. 1 I. INTRODUCTION A. Outline • Paramagnetism • Spin exchange vs dipolar interaction • Heisenberg model and crystalline anisotropies • Hostein-Primakoff and Schwinger bosons • Jordan-Wigner transformation and XXZ chain • Coherent-spin states and Berry phases • Mean-field and Landau theory of FM and AFM states B. Background In these notes we will explore some of aspects of magnetism in charge insulators. Mag- netism is a formation and response of magnetic moments to external magnetic field H and their interaction. In general there are two sources of magnetic moment and associated mag- netization density M. One is quite intuitive, due to orbital charge current j in the material 1 Z M = r × j, 2 r much like current wire loop produces magnetic field. -
Publications of Members, 1930-1954
THE INSTITUTE FOR ADVANCED STUDY PUBLICATIONS OF MEMBERS 1930 • 1954 PRINCETON, NEW JERSEY . 1955 COPYRIGHT 1955, BY THE INSTITUTE FOR ADVANCED STUDY MANUFACTURED IN THE UNITED STATES OF AMERICA BY PRINCETON UNIVERSITY PRESS, PRINCETON, N.J. CONTENTS FOREWORD 3 BIBLIOGRAPHY 9 DIRECTORY OF INSTITUTE MEMBERS, 1930-1954 205 MEMBERS WITH APPOINTMENTS OF LONG TERM 265 TRUSTEES 269 buH FOREWORD FOREWORD Publication of this bibliography marks the 25th Anniversary of the foundation of the Institute for Advanced Study. The certificate of incorporation of the Institute was signed on the 20th day of May, 1930. The first academic appointments, naming Albert Einstein and Oswald Veblen as Professors at the Institute, were approved two and one- half years later, in initiation of academic work. The Institute for Advanced Study is devoted to the encouragement, support and patronage of learning—of science, in the old, broad, undifferentiated sense of the word. The Institute partakes of the character both of a university and of a research institute j but it also differs in significant ways from both. It is unlike a university, for instance, in its small size—its academic membership at any one time numbers only a little over a hundred. It is unlike a university in that it has no formal curriculum, no scheduled courses of instruction, no commitment that all branches of learning be rep- resented in its faculty and members. It is unlike a research institute in that its purposes are broader, that it supports many separate fields of study, that, with one exception, it maintains no laboratories; and above all in that it welcomes temporary members, whose intellectual development and growth are one of its principal purposes. -
Dark Matter and Dark Energy
HTS Teologiese Studies/Theological Studies ISSN: (Online) 2072-8050, (Print) 0259-9422 Page 1 of 8 Original Research The building blocks of the universe Author: I review the state of knowledge of the composition of the universe for a non-specialist audience. 1,2 Anslyn J. John The universe is built up of four components. These are radiation, baryonic (ordinary) matter, Affiliation: dark matter and dark energy. In this article, a quick outline of the theory of Big Bang 1Department of Physics, nucleosynthesis is presented, and the origin of the elements is explained. Cosmology requires Faculty of Science, the presence of dark matter, which forms most of the mass of the universe, and dark energy, Stellenbosch University, which drives the acceleration of the expansion. The dark sector is motivated, and possible Stellenbosch, South Africa explanations are stated. 2National Institute for Contribution: As part of this special collection on building blocks, the building blocks of the Theoretical and Computational Sciences universe are discussed and unsolved problems and proposed solutions are highlighted. (NITheCS), South Africa Keywords: cosmology; nucleosynthesis; dark matter; dark energy; cosmological constant; Corresponding author: general relativity; galaxies; particle physics. Anslyn John, [email protected] Dates: Introduction Received: 10 May 2021 Cosmology is the scientific study of the origin and development of the universe on the largest Accepted: 12 July 2021 Published: 25 Aug. 2021 scales. Today, the standard model of cosmology is a cornerstone of physics and astronomy. This is attested to by the award of four Nobel Prizes for research in cosmology. These awards, in How to cite this article: chronological order, are: John, A.J., 2021, ‘The building blocks of the universe’, 1. -
History of the Israeli/ Understand How the “Einstein Letter” Relates to the Palestinian Conflict, We Can Turn to a Trustworthy Jewish Present Situation
The Israeli-Palestinian Conflict continues primarily to advocate on behalf of Israel and to address threats to its continued existence and security. Part 1 A religious variety of Zionism supports Jews upholding Zionism is both an ideology and nationalist movement their Jewish identity defined as adherence to religious among the Jewish people that espouses the re- Judaism, opposes the assimilation of Jews into other establishment and support for a Jewish state in the societies, and has advocated the return of Jews territory defined as the historic Land of Israel (roughly to Israel as a means for Jews to be a majority nation in corresponding to Canaan, the Holy Land, or the region their own state. A variety of Zionism, called cultural of Palestine). Modern Zionism emerged in the late 19th Zionism, founded and represented most prominently century in Central and Eastern Europe as a national revival by Ahad Ha'am, fostered a secular vision of a Jewish movement, both in reaction to newer waves "spiritual center" in Israel. Unlike Herzl, the founder of of antisemitism and as a response to Haskalah, or Jewish political Zionism, Ahad Ha'am strived for Israel to be "a [17] Enlightenment. Soon after this, most leaders of the Jewish state and not merely a state of Jews". movement associated the main goal with creating the Advocates of Zionism view it as a national liberation desired state in Palestine, then an area controlled by movement for the repatriation of a persecuted people the Ottoman Empire. residing as minorities in a variety of nations to their Until 1948, the primary goals of Zionism were the re- ancestral homeland. -
2015 Annual Report
2015 AMERICAN PHYSICAL SOCIETY ANNUAL TM ADVANCING PHYSICS REPORT TM THE AMERICAN PHYSICAL SOCIETY STRIVES TO Be the leading voice for physics and an authoritative source of physics information for the advancement of physics and the benefit of humanity Collaborate with national scientific societies for the advancement of science, science education, and the science community Cooperate with international physics societies to promote physics, to support physicists worldwide, and to foster international collaboration Have an active, engaged, and diverse membership, and support the activities of its units and members © 2016 American Physical Society During 2015, APS worked to institute the governance objective: “the advancement and diffusion of the knowledge changes approved by the membership in late 2014. In of physics.” APS is fully committed to the principles of OA accordance with the new Constitution & Bylaws, in to the extent that we can continue to support the production February the Board appointed our first Chief Executive of high-quality peer-reviewed journals. For many years APS Officer—Kate Kirby, the former Executive Officer—to has supported “green” OA and we have been fully compliant head the APS. Kate’s major task has been to transition with the 2013 directive from the Office of Science and the management of APS to a CEO model with a Senior Technology Policy that the publications resulting from Management Team. She appointed Mark Doyle as Chief U.S. federally funded research be accessible to the public 12 Information Officer, James Taylor as Chief Operating months after publication. Since APS is a major international Officer, and Matthew Salter as the new Publisher. -
After Dinner Speech by Dr
1 After Dinner Speech by Dr. Josef Rembser CERN, Geneva 14 September 2009 Celebration in honour of Professor Herwig Schopper’s 85 th Birthday I. Dear Friends, honourable, dear Professor Schopper! On 28 February of this year, you celebrated your 85th Birthday. This evening we are looking back on this memorable date, wishing you many happy returns of the day. You have been blessed with a life full of harmony and accomplishments, always keeping young physically and intellectually. This is a special blessing granted to a person: Love and family, friendships and encounters, giving and receiving, working and achieving acknowledgements and honours in a fulfilling profession and in challenging missions. Tomorrow, a scientific Colloquium will honour you as researcher and scientific teacher . Today, on the eve of the colloquium, I would like to speak about Herwig Schopper as a research politician and a research manager . My personal remarks and remembrances will focus, dear Herwig Schopper, on the guiding contributions you made in shaping, promoting and advancing science and research and their relevant policies in Germany and in Europe. 2 Professor Heuer, I am grateful for your invitation. It is a pleasure for me to give today's After-Dinner speech in honour of our jubilee. For many years during my service in the German Ministry of Research and Technology (BMFT) in Bonn I had close personal and professional connections with you, dear Professor Schopper, regarding German science and research policy including CERN. II. In 1945, with the end of the 2 nd World War, Germany as guilty party and loser plunged the world and its own country into destruction and suffering, thus experiencing a historical catastrophe. -
William Alfredo Loinaz
William Alfredo Loinaz Office Department of Physics Amherst College Amherst, MA 01002 (413) 542-7968 [email protected] EDUCATION: Ph.D. in Physics, July 1995 THE UNIVERSITY OF MICHIGAN, Ann Arbor, MI. Doctoral Thesis: EXCLUSIVE SEMILEPTONIC AND RADIATIVE DECAYS OF B BARYONS TO LIGHT BARYONS M.S. in Physics, May 1991 THE UNIVERSITY OF MICHIGAN, Ann Arbor, MI. B.S.E in Mechanical Engineering, Certificate in Engineering Physics, May 1989: PRINCETON UNIVERSITY, Princeton, NJ. Undergraduate Thesis: AN INVESTIGATION INTO THE USE OF STIMULATED RAMAN SCATTERING FROM O2 FOR USE IN TAGGING SUPERSONIC AIRFLOWS RESEARCH EXPERIENCE: Visiting Researcher (July 2007-present) UNIVERSITY OF MASSACHUSETTS AT AMHERST. Associate Professor (July 2007-present) AMHERST COLLEGE. KITP Scholars Program (2003-2005) KAVLI INSTITUTE FOR THEORETICAL PHYSICS (UNIVER- SITY OF CALIFORNIA AT SANTA BARBARA). Assistant Professor (July 2000-June 2007) AMHERST COLLEGE. Visiting Researcher (July 2003-July 2004) UNIVERSITY OF MASSACHUSETTS AT AMHERST. Fermilab Summer Visitors Program (July/August 1999) FERMILAB. Research in electroweak phe- nomenology, strong coupling gauge theories. Postdoctoral Research Associate (1997-2000) VIRGINIA POLYTECHNIC INSTITUTE & STATE UNI- VERSITY. Research in electroweak and Higgs physics, gauge theories, perturbative QCD, lattice field theory, SUSY and strongly-coupled extensions to the Standard Model. Postdoctoral Research Associate (1995-1997) THE UNIVERSITY OF PITTSBURGH. Research in perturbative QCD as applied to B physics, Higgs physics, and lattice field theory. Fermilab Summer Visitors Program (July/August 1995) FERMILAB. Research in perturbative QCD, and B physics. Research Assistant (1992-1995) THE UNIVERSITY OF MICHIGAN with Prof. R. Akhoury. Research in chiral perturbation theory, perturbative QCD, and B physics. Research Assistant (1991-1992) THE UNIVERSITY OF MICHIGAN with Prof. -
April 17-19, 2018 the 2018 Franklin Institute Laureates the 2018 Franklin Institute AWARDS CONVOCATION APRIL 17–19, 2018
april 17-19, 2018 The 2018 Franklin Institute Laureates The 2018 Franklin Institute AWARDS CONVOCATION APRIL 17–19, 2018 Welcome to The Franklin Institute Awards, the a range of disciplines. The week culminates in a grand United States’ oldest comprehensive science and medaling ceremony, befitting the distinction of this technology awards program. Each year, the Institute historic awards program. celebrates extraordinary people who are shaping our In this convocation book, you will find a schedule of world through their groundbreaking achievements these events and biographies of our 2018 laureates. in science, engineering, and business. They stand as We invite you to read about each one and to attend modern-day exemplars of our namesake, Benjamin the events to learn even more. Unless noted otherwise, Franklin, whose impact as a statesman, scientist, all events are free, open to the public, and located in inventor, and humanitarian remains unmatched Philadelphia, Pennsylvania. in American history. Along with our laureates, we celebrate his legacy, which has fueled the Institute’s We hope this year’s remarkable class of laureates mission since its inception in 1824. sparks your curiosity as much as they have ours. We look forward to seeing you during The Franklin From sparking a gene editing revolution to saving Institute Awards Week. a technology giant, from making strides toward a unified theory to discovering the flow in everything, from finding clues to climate change deep in our forests to seeing the future in a terahertz wave, and from enabling us to unplug to connecting us with the III world, this year’s Franklin Institute laureates personify the trailblazing spirit so crucial to our future with its many challenges and opportunities. -
Valery Pokrovsky Landau and Theory of Phase Transitions
Landau and Theory of Phase Transitions Valery Pokrovsky Dept. of Physics, Texas A&M University and Landau Institute for Theoretical Physics Landau Centenary, APS March Meeting, March 18, 2009. Landau phenomenon Scirus Fermi liquids – 45,000 2008 Phase transitions -- 30,000 Landau levels -- 75,500 Landau-Lifshitz Equation -- 23,000 5 Nobel prizes based on Landau works: K. Wilson; P.-G. De Gennes; A.A. Abrikosov, V.L. Ginzburg, A. Legget; K. von Klitzing; D.Tsui, H. Störmer, R.B. Loughlin. Longevity of the LL Course 1940-20.. Landau Centenary, APS March Meeting, March 18, 2009. Extremely general and simple notions: Density matrix Spontaneous symmetry breaking Fermi liquid Quasiparticles Simple and effective formalism Phase transitions Landau levels Neutron stars Unique view of entire physics Landau Centenary, APS March Meeting, March 18, 2009. Landau theory of phase transitions: History Predecessors Curie-Weiss theory of self-consistent field in ferromagnets Ehrenfest theory of higher order transitions Landau: Contribution to theory of specific heat anomaly Phys. Zs. Sowjet., 8, 113 (1935) 23 - degree of order Φ=Φ0 +abξ +ξξ + c ξ aTT=−α ( c ) Landau Centenary, APS March Meeting, March 18, 2009. 3 articles published in 1937 in ZhETF and Phys. Zs. Sowjet. Theory of phase transitions I Concept of spontaneous symmetry violation. Ordered phase is characterized by some irreducibleOnly one IR representation appears near oftransition the initial point symmetry group. 24 ⎛⎞TT− c η 22= c Φ=abaηη +; = α ⇒∝η TT − δρϕ= c ∑ i ⎜⎟ c ∑ ni ni i ⎝⎠Tc ni, Specific heat has a finite jump at transition Theory of phase transitions II 1. -
Is the Universe Ringing Like a Crystal Glass? by Tara Burcham, University of Southern Mississippi
Home / Astronomy & Space / Astronomy JUNE 26, 2015 Is the universe ringing like a crystal glass? by Tara Burcham, University of Southern Mississippi The standard view of the expanding universe. Many know the phrase "the big bang theory." There's even a top television comedy series with that as its title. According to scientists, the universe began with the "big bang" and expanded to the size it is today. Yet, the gravity of all of this matter, stars, gas, galaxies, and mysterious dark matter, tries to pull the universe back together, slowing down the expansion. Now, two physicists at The University of Southern Mississippi, Lawrence Mead and Harry Ringermacher, have discovered that the universe might not only be expanding, but also oscillating or "ringing" at the same time. Their paper on the topic has been published in the April 2015 issue of the Astronomical Journal. In 1978 Arno Allan Penzias and Robert Woodrow Wilson received the Nobel prize for their 1964 discovery of the key signature of this theory, the primal radiation from the early universe known as the "cosmic microwave background" (CMB). "Then in 1998 the finding that the universe was not only expanding, but was speeding up, or accelerating in its expansion was a shock when it was discovered simultaneously by east coast and west coast teams of astronomers and physicists," said Mead. "A new form of matter, dark energy, repulsive in nature, was responsible for the speed-up. The teams led by Saul Perlmutter, Adam Riess, and Brian Schmidt won the 2011 Nobel Prize in Physics for that discovery." According to Mead and Ringermacher, this change from slowing down to speeding up (the transition time) took place approximately 6 to 7 billion years ago. -
Nobel Lectures™ 2001-2005
World Scientific Connecting Great Minds 逾10 0 种 诺贝尔奖得主著作 及 诺贝尔奖相关图书 我们非常荣幸得以出版超过100种诺贝尔奖得主著作 以及诺贝尔奖相关图书。 我们自1980年代开始与诺贝尔奖得主合作出版高品质 畅销书。一些得主担任我们的编辑顾问、丛书编辑, 并于我们期刊发表综述文章与学术论文。 世界科技与帝国理工学院出版社还邀得其中多位作了公 开演讲。 Philip W Anderson Sir Derek H R Barton Aage Niels Bohr Subrahmanyan Chandrasekhar Murray Gell-Mann Georges Charpak Nicolaas Bloembergen Baruch S Blumberg Hans A Bethe Aaron J Ciechanover Claude Steven Chu Cohen-Tannoudji Leon N Cooper Pierre-Gilles de Gennes Niels K Jerne Richard Feynman Kenichi Fukui Lawrence R Klein Herbert Kroemer Vitaly L Ginzburg David Gross H Gobind Khorana Rita Levi-Montalcini Harry M Markowitz Karl Alex Müller Sir Nevill F Mott Ben Roy Mottelson 诺贝尔奖相关图书 THE PERIODIC TABLE AND A MISSED NOBEL PRIZES THAT CHANGED MEDICINE NOBEL PRIZE edited by Gilbert Thompson (Imperial College London) by Ulf Lagerkvist & edited by Erling Norrby (The Royal Swedish Academy of Sciences) This book brings together in one volume fifteen Nobel Prize- winning discoveries that have had the greatest impact upon medical science and the practice of medicine during the 20th “This is a fascinating account of how century and up to the present time. Its overall aim is to groundbreaking scientists think and enlighten, entertain and stimulate. work. This is the insider’s view of the process and demands made on the Contents: The Discovery of Insulin (Robert Tattersall) • The experts of the Nobel Foundation who Discovery of the Cure for Pernicious Anaemia, Vitamin B12 assess the originality and significance (A Victor Hoffbrand) • The Discovery of -
Polite Debate
4 Nature Vol. 286 3 July 1980 High-energy physics Schopper, would be able to organize and prototype vitrification plant operating at draw on talent throughout CERN, for Windscale by 1990 if the go-ahead for the short and long periods, avoiding the career plant can be given some time this year. LEP leaps ahead problems and inflexibility that would come The decision for British Nuclear Fuels, THE European Centre for Nuclear with a new "LEP division". "We will which runs Windscale, will not be easy, Research (CERN) last week made a firm bring the work to the people", he said. however; it will have to choose between its proposal lo its 12 member states for a new The CERN Council has adopted a own HARVEST process and the French accelerator to be built in the 1980s. The "firm" budget for 1981 of 596 million equivalent (A VM) which has been machine, called LEP, is a 30 km circum Swiss francs (£156 million), but this operating commercially since 1978. ference ring for accelerating, storing and includes no provision for the construction Officials are keen to point out that a colliding very high energy beams of of LEP. Schopper will propose a running decision to opt for A VM would not mean electrons. The proposal already bears the budget which will include LEP in six the end of HAR VEST, which should be mark of CERN's firebrand director months' time: he expects it to be a little kept going to keep later options open. general-designate, German Professor larger than the 198 I budget "but we are The government plans to start producing Herwig Schopper: LEP is now cheaper only talking of a per cent or two".