Showing papers by "Alan H. Guth published in 1983"
TL;DR: In this article, the cosmological consequences of a phase transition driven primarily by slow nucleation of bubbles of the new phase via the effectively zero temperature quantum tunneling process of Coleman and Callan are investigated.
474 citations
Book•
01 Jan 1983
TL;DR: The first few months of the universe, the MIT bag model, and grand unified theories are among the chief concerns of these essays and articles honoring MIT theoretical physicist Francis Low.
Abstract: The first few months of the universe, the MIT bag model, and grand unified theories are among the chief concerns of these essays and articles honoring MIT theoretical physicist Francis Low. The book opens with a cluster of dedicatory pieces by Murray Gell-Mann, Marvin L. Goldberger, Jeremy Bernstein, and Val L. Fitch.The remainder of the book consists of twenty technical essays by a small galaxy of distinguished scientists: Steven Weinberg; Kenneth A. Johnson; Sidney Drell; Geoffrey F. Chew; Mitchell J. Feigenbaum; Victor F. Weisskopf; Herman Feshbach; Carleton DeTar; John F. Donoghue; D. Danckaert, P. DeCausmaecker, R. Gastmans, W. Troost, and Tai Tsun Wu, writing jointly; Roman Jackiw; William I. Weisberger; Adrian Patrascioiu; Gino Segre; So-Young Pi; Asim Yildiz; Jogesh C. Pati, Abdus Salam, and J. Strathdee, in another collaborative contribution; and the three editors.Among the other topics are "Why the Renormalization Group Is a Good Thing" - the physics of asymptotic freedom - the topological bootstrap "The Fixed Point of Classical Dynamical Evolution and Chaos" - compound bags and hadron-hadron interactions - "Gauge Invariance and Mass" - Gribov ambiguities - "The Simple Facts about the Baryon Asymmetry of the Universe" - preons and supersymmetry - some speculations on the origin of the matter, energy, and entropy of the universe - the Chew-Low theory and the quark model - "From Gell-Mann-Low to Unification."The editors are all affiliated with the Center for Theoretical Physics at MIT.
19 citations
TL;DR: In this article, it was shown that the quantity S (defined in ref. 1 and below), which must decrease by ∼1075 to allow the present universe to bounce, can in fact decrease by no more than a factor of ∼2.
Abstract: Petrosian1 has recently discussed the possibility that the restoration of symmetry at grand unification in a closed contracting Robertson–Walker universe could slow down and halt the contraction, causing the universe to bounce. He then went on to discuss the possibility that our universe has undergone a series of such bounces. We disagree with this analysis. One of us (M.S.) has already shown2 that if a contracting universe is dominated by radiation, then a bounce is impossible. We will show here two further results: (1) entropy considerations imply that the quantity S (defined in ref. 1 and below), which must decrease by ∼1075 to allow the present Universe to bounce, can in fact decrease by no more than a factor of ∼2; (2) if the true vacuum state has zero energy density, then a universe which is contracting in its low temperature phase can never complete a phase transition soon enough to cause a bounce.
10 citations
01 Jan 1983
TL;DR: In this article, the authors discuss two possible mechanisms which might suppress magnetic monopole production in the early history of the universe: a high temperature superconductor and the inflationary universe.
Abstract: When a typical grand unified theory (GUT) is considered in the context of standard cosmology, one is led immediately to the conclusion that far too many magnetic monopoles would have been produced in the very early history of the universe.1,2 In this talk I will discuss two possible mechanisms which might suppress monopole production. The first is the idea of a high temperature superconductor, as proposed by Langacker and Pi.3 The second is the inflationary universe.4,5,6 Befitting my biases, I will devote most of my time to the latter.
5 citations