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Position-space renormalization for systems with weak long-range interactions and the breakdown of hyperscaling (1977)

Knops, H. J. F. ; Leeuwen, J. M. J. ; Hemmer, P. C.

Springer

Journal of statistical physics 17 (1977), S. 197-214

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ISSN: 1572-9613

Keywords: Renormalization ; long-range interactions ; scaling ; dangerous irrelevant variables ; redundant variables ; hyperscaling ; saddle ; point method ; cumulant expansion

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Exact renormalization group equations are derived for a position-space renormalization of spin systems with weak long-range forces. It is shown how an apparent dependence of the critical exponents on the choice of the renormalization group can be resolved via the mechanism of “dangerous irrelevant variables” and that this same mechanism is responsible for the breakdown of hyperscaling. The dimensiond=4 can be seen to be a borderline dimension above which classical critical exponents are expected.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01040102

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