Crossover critical correlation function |
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| Authors: | R. A. Ferrell J. K. Bhattacharjee D. J. Scalapino |
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| Affiliation: | (1) Max-Planck-Institut für Festkörperforschung, Stuttgart, Federal Republic of Germany;(2) Present address: Department of Physics and Astronomy, University of Maryland, 20742 College Park, Maryland, USA;(3) Institute for Physical Science and Technology, University of Maryland, 20742 College Park, Maryland, USA;(4) Department of Physics, University of California, 93106 Santa Barbara, California, USA;(5) Present address: Department of Physics, Indian Institute of Technology, 20816 Kampur, India |
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| Abstract: | ![]()
The anomalous dimension index  assumes its critical value for small momenta and vanishes for large momenta. We provide, in the form of a quadrature, a momentum dependent (k) which interpolates between the above limits. High- and low-momentum expansions for the spectral function are obtained, leading to a Padé approximant from which (k) is determined, thereby giving a crossover critical correlation function.Dedicated to B. Mühlschlegel on the occasion of his 60th birthday |
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