Why does it have one time and three space dimensions--or does it? What is it made of? What does it mean when we hear a new particle has been discovered? In what sense is the behavior of complex bodies "merely a consequence" of that of their atomic constituents? Will quantum mechanics eventually give way to a totally new description of the world, one whose features we cannot even begin to imagine? This book aims to give the non-specialist reader a general overview of what physicists think they do and do not know in some representative frontier areas of contemporary physics.
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After sketching out the historical background, A. Leggett goes on to discuss the current situation and some of the open problems in cosmology, high-energy physics, and condensed-matter physics. This book focuses not so much on recent achievements as on the fundamental problems at the heart of the subject, and emphasizes the provisional nature of our present understanding of things.
Bose condensation and Cooper pairing in condensed-matter systems by A. J Leggett 31 editions published between and in English and held by WorldCat member libraries worldwide Introducing the related phenomena of Bose condensation and Cooper pairing, in which a very large number of single particles or pairs of particles are forced to behave in exactly the same way, this book explores their consequences in condensed matter systems, eschewing advanced formal methods.
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The ""system"" in question need not be physically distinct from its environment, but could, for example, be one particular degree of freedom on which attention is focussed, as in the case of the Josephson junction studied in several of the papers. This general problem has been studied in many hundreds, if not thousands, of articles in the literature, in contexts as diverse.
Quantum computing and quantum bits in mesoscopic systems by A.
J Leggett Book 14 editions published between and in English and held by WorldCat member libraries worldwide Quantum information science is a new field of science and technology which requires the collaboration of researchers coming from different fields of physics, mathematics, and engineering: Quantum Computing and Quantum Bits in Mesoscopic Systems addresses fundamental aspects of quantum physics, enhancing the connection between the quantum behavior of macroscopic systems and information theory.
In addition to theoretical quantum physics, the book comprehensively explores practical implementation of quantum computing and information processing devices. On the experimental side, this book reports on recent and previous observations of quantum behavior in several physical systems, coherently coupled Bose-Einstein condensates, quantum dots, superconducting quantum interference devices, Cooper pair boxes, and electron pumps in the context of the Josephson effect.
In these systems, the book discusses all required steps, from fabrication through characterization to the final basic implementation for quantum computing. Qualitative methods in quantum theory by A. B Migdal Book 12 editions published between and in English and held by 47 WorldCat member libraries worldwide. Blown away by Ginger Gregg Duggan Book 2 editions published between and in English and held by 47 WorldCat member libraries worldwide.
Nuclear theory; the quasiparticle method by A. B Migdal Book 3 editions published in in English and held by 34 WorldCat member libraries worldwide. In his last year at Beaumont, Leggett won every single prize for the subjects that he studied that year. Leggett won a scholarship to Balliol College, Oxford , in December and entered the University the following year with the intention of reading the degree technically known as Literae Humaniores classics.
After completing his first degree he began a second undergraduate degree, this time in physics at Merton College, Oxford. As with all of ter Haar's students in that period, the tentatively assigned thesis topic was "Some Problems in the Theory of Many-Body Systems" , which left a considerable degree of latitude.
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Dirk took a great interest in the personal welfare of his students and their families, and was meticulous in making sure they received adequate support; indeed, he encouraged Leggett to apply for a Prize Fellowship at Magdalen, which he held from to In the end Leggett's thesis consisted of studies of two somewhat disconnected problems in the general area of liquid helium , one on higher-order phonon interaction processes in superfluid 4 He and the other on the properties of dilute solutions of 4 He in normal liquid 3 He a system which unfortunately turned out to be much less experimentally accessible than the other side of the phase diagram, dilute solutions of 3 He in 4 He.
After one more postdoctoral year which he spent in "roving" mode, spending time at Oxford, Harvard, and Illinois, in the autumn of he took up a lectureship at the University of Sussex , where he was to spend the majority of the next fifteen years of his career. As he had already committed himself to an eight-month stay as a visiting scientist at Cornell in early , [12] he finally arrived in Urbana in the early fall of that year, and has been there ever since.
Leggett's own research interests shifted away from superfluid 3 He since around ; he worked inter alia on the low-temperature properties of glasses, high-temperature superconductivity, the Bose—Einstein condensate BEC atomic gases and above all on the theory of experiments to test whether the formation of quantum mechanics will continue to describe the physical world as we push it up from the atomic level towards that of everyday life.
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From to , he also held a position at the Institute for Quantum Computing in Waterloo, Canada. He currently [ when? His research focuses on cuprate superconductivity , superfluidity in highly degenerate atomic gases , low temperature properties of amorphous solids , conceptual issues in the formulation of quantum mechanics and topological quantum computation. The edition of 29 December of the International Herald Tribune printed an article, "New tests of Einstein's 'spooky' reality", which referred to Leggett's Autumn debate at a conference in Berkeley, California , with fellow Nobel laureate Norman Ramsey of Harvard University.
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Leggett thought attempts were justified, Ramsey opposed. Leggett believes quantum mechanics may be incomplete because of the quantum measurement problem. He was awarded the Nobel Prize in Physics with V. Abrikosov for pioneering contributions to the theory of superconductors and superfluids. He was also honoured with the Eugene Feenberg Memorial Medal In June he married Haruko Kinase. To listen to an audio podcast, mouse over the title and click Play. Open iTunes to download and subscribe to podcasts. Ideas Roadshow creates unique reflections of leading thinkers across the arts and sciences through the medium of filmed conversations.
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