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Search Results: 1 - 10 of 9979 matches for " Frank Wilczek "
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Anticipating a New Golden Age
Wilczek, Frank
High Energy Physics - Phenomenology , 2007, DOI: 10.1142/S0217751X08040391
Abstract: The standard model of fundamental interactions is remarkably successful, but it leaves an unfinished agenda. Several major questions seem ripe for exploration in the near future. I anticipate that the coming decade will be a Golden Age of discovery in fundamental physics.
Fundamental Constants
Wilczek, Frank
High Energy Physics - Phenomenology , 2007,
Abstract: The notion of ``fundamental constant'' is heavily theory-laden. A natural, fairly precise formulation is possible in the context of the standard model (here defined to include gravity). Some fundamental constants have profound geometric meaning. The ordinary gravitational constant parameterizes the stiffness, or resistance to curvature, of space-time. The cosmological term parameterizes space-time's resistance to expansion -- which may be, and apparently is at present, a {\it negative} resistance, i.e. a tendency toward expansion. The three gauge couplings of the strong, electromagnetic, and weak interactions parameterize resistance to curvature in internal spaces. The remaining fundamental couplings, of which there are a few dozen, supply an ungainly accommodation of inertia. The multiplicity and variety of fundamental constants are esthetic and conceptual shortcomings in our present understanding of foundational physics. I discuss some ideas for improving the situation. I then briefly discuss additional constants, primarily cosmological, that enter into our best established present-day world model. Those constants presently appear as macroscopic state parameters, i.e. as empirical ``material constants'' of the Universe. I mention a few ideas for how they might become fundamental constants in a future theory. In the course of this essay I've advertised several of my favorite speculations, including a few that might be tested soon.
Beyond the Standard Model
Frank Wilczek
Physics , 1993, DOI: 10.1111/j.1749-6632.1993.tb43889.x
Abstract: The standard model of particle physics is marvelously successful. However, it is obviously not a complete or final theory. I shall argue here that the structure of the standard model gives some quite concrete, compelling hints regarding what lies beyond.
Statistical Transmutation and Phases of Two-Dimensional Quantum Matter
Frank Wilczek
Physics , 1995,
Abstract: After surveying the quantum kinematics and dynamics of statistical transmutation, I show how this concept suggests a phase diagram for the two-dimensional matter in a magnetic field, as a function of quantum statistics. I discuss the fundamental properties of quasiparticles in the different phases, and briefly suggest {\it gedanken\/} -- but not manifestly infeasible -- experiments to show up these properties.
Status of QCD
Frank Wilczek
Physics , 1993, DOI: 10.1063/1.454660
Abstract: I have been asked to discuss the status of QCD. It seems to me that there are three main points to be made about the present status of QCD: $\bullet$ QCD is right, and we can do many beautiful things with it. $\bullet$ There are several important concrete problems that lie just beyond the edge of our current understanding. $\bullet$ There are some foundational issues in QCD, and some recent developments, that may point toward entirely new directions. These points will, I believe, emerge quite clearly from the following more detailed discussion. The discussion will be in three parts. I'll first discuss elementary processes, then more complicated processes, and then finally foundational issues.
From the Standard Model to Dark Matter
Frank Wilczek
Physics , 1995, DOI: 10.1063/1.48314
Abstract: The standard model of particle physics is marvelously successful. However, it is obviously not a complete or final theory. I shall argue here that the structure of the standard model gives some quite concrete, compelling hints regarding what lies beyond. Taking these hints seriously, one is led to predict the existence of new types of very weakly interacting matter, stable on cosmological time scales and produced with cosmologically interesting densities--that is, ``dark matter''.
New Kinds of Quantum Statistics
Frank Wilczek
Physics , 2008, DOI: 10.1007/978-3-7643-8799-0_2
Abstract: I review the quantum kinematics of identical particles, which suggests new possibilities, beyond bosons and fermions, in 2+1 dimensions; and how simple flux-charge constructions embody the new possibilities, leading to both abelian and nonabelian anyons. I briefly allude to experimental realizations, and also advertise a spinor construction of nonabelian statistics, that has a 3+1 dimensional extension.
Particle Physics for Cosmology
Frank Wilczek
Physics , 1996,
Abstract: I discuss some central issues in particle physics which are potentially relevant to cosmology. I first briefly review the present (glorious) experimental status of the Standard Model, emphasizing that it provides a firm foundation both for early Universe cosmology and for further exploration toward the basic laws of Nature. I then provide a critique, arguing that while there are no clear discrepancies, there are several major, specific deficiencies of the Standard Model which clearly point up its provisional character. I elaborate on the story theorists have made up to address one of these problems, the problem of scattered multiplets, and show how upon following it out one finds, within existing experiments, encouragement -- bordering on evidence -- for certain ambitious ideas regarding unification and supersymmetry. I briefly describe and contrast two paradigms of supersymmetry breaking, which have markedly different experimental and cosmological consequences. I call attention to specific connections with cosmology where appropriate throughout; and near the end I make some more global remarks. Finally I venture a speculation suggesting, in a fairly concrete way, the possibility that the laws of physics cannot, in principle, be disentangled from cosmology.
Aspects of d-Density Order
Frank Wilczek
Physics , 1995,
Abstract: I briefly review the concept of d-density ordering, extend it to arbitrary dimensions, and speculate that it might describe Mott insulators. This ordering supports zero modes on domain walls, and quite plausibly dopants occupy such states. This phenomenon could induce quasi-one dimensional behavior in a two-dimensional electron system.
Asymptotic Freedom
Frank Wilczek
Physics , 1996,
Abstract: I discuss how the basic phenomenon of asymptotic freedom in QCD can be understood in elementary physical terms. Similarly, I discuss how the long-predicted phenomenon of ``gluonization of the proton'' -- recently spectacularly confirmed at HERA -- is a rather direct manifestation of the physics of asymptotic freedom. I review the broader significance of asymptotic freedom in QCD in fundamental physics: how on the one hand it guides the interpretation and now even the design of experiments, and how on the other it makes possible a rational, quantitative theoretical approach to problems of unification and early universe cosmology.
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