Papers by Robert Swendsen
Entropy
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Entropy
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Reports on progress in physics. Physical Society (Great Britain), 2018
A little over ten years ago, Campisi, and Dunkel and Hilbert, published papers claiming that the ... more A little over ten years ago, Campisi, and Dunkel and Hilbert, published papers claiming that the Gibbs (volume) entropy of a classical system was correct, and that the Boltzmann (surface) entropy was not. They claimed further that the quantum version of the Gibbs entropy was also correct, and that the phenomenon of negative temperatures was thermodynamically inconsistent. Their work began a vigorous debate of exactly how the entropy, both classical and quantum, should be defined. The debate has called into question the basis of thermodynamics, along with fundamental ideas such as whether heat always flows from hot to cold. The purpose of this paper is to sum up the present status-admittedly from my point of view. I will show that standard thermodynamics, with some minor generalizations, is correct, and the alternative thermodynamics suggested by Hilbert, Hänggi, and Dunkel is not. Heat does not flow from cold to hot. Negative temperatures are thermodynamically consistent. The small ...
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American Journal of Physics
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Physical Review B
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AIP Conference Proceedings
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Physical review. E, 2017
We present a surprisingly simple approach to high-accuracy calculations of the critical propertie... more We present a surprisingly simple approach to high-accuracy calculations of the critical properties of the three-dimensional Ising model. The method uses a modified block-spin transformation with a tunable parameter to improve convergence in the Monte Carlo renormalization group. The block-spin parameter must be tuned differently for different exponents to produce optimal convergence.
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Physical Review Letters, Nov 24, 1986
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Phys Rev B, 1984
... par différentes transformations en espace réel du modèle de Ising à d=2, en utilisant une tec... more ... par différentes transformations en espace réel du modèle de Ising à d=2, en utilisant une technique développée récemment pour calculer les paramètres renormalisés de couplage à partir d'une simulation de Monte Carlo d'un ... Faire une nouvelle recherche Make a new search.
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Physica a Statistical Mechanics and Its Applications, Sep 1, 1990
The Swendsen-Wang and Wolff Monte Carlo algorithms are described in some detail, using the Potts ... more The Swendsen-Wang and Wolff Monte Carlo algorithms are described in some detail, using the Potts model as an example. Various generalizations are then reviewed and some applications are discussed. Two complete Fortran programs for the algorithms are provided.
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Since the invention of the Metropolis method in 1953, Monte Carlo methods have been shown to prov... more Since the invention of the Metropolis method in 1953, Monte Carlo methods have been shown to provide an efficient, practical approach to the calculation of physical properties in a wide variety of systems. In this talk, I will discuss some of the advances in the MC simulation of thermodynamics systems, with an emphasis on optimization to obtain a maximum of useful information.
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ABSTRACT Gibbs’ Paradox is shown to arise from an incorrect traditional definition of the en... more ABSTRACT Gibbs’ Paradox is shown to arise from an incorrect traditional definition of the entropy that has unfortunately become entrenched in physics textbooks. Among its flaws, the traditional definition predicts a violation of the second law of thermodynamics when applied to colloids. By adopting Boltzmann’s definition of the entropy, the violation of the second law is eliminated, the properties of colloids are correctly predicted, and Gibbs’ Paradox vanishes.
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Phys Rev Lett, 1977
ABSTRACT
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... 3:54 PM–4:06 PM. Preview Abstract. Authors: F. Marty Ytreberg Daniel M. Zuckerman (University... more ... 3:54 PM–4:06 PM. Preview Abstract. Authors: F. Marty Ytreberg Daniel M. Zuckerman (University of Pittsburgh). ... The first approach is an adaptive integration Monte Carlo procedure which continually updates the free energy profile connecting the two states of interest. ...
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Physical Review B Condensed Matter, 1990
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Phys Rev B, 1981
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Phys Rev Lett, 1979
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Papers by Robert Swendsen