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C function representation of the Local Potential Approximation
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DOI：10.1016/S0370-2693(97)00729-6.png)
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摘要
En 中文
Within the Local Potential Approximation to Wilson's, or Polchinski's, exact renormalization group, and for general spacetime dimension, we construct a function, c, of the coupling constants; it has the property that (for unitary theories) it decreases monotonically along flows, and is stationary only at fixed points - where it 'counts degrees of freedom', i.e. is extensive, counting one for each Gaussian scalar. Furthermore, by choosing restrictions to some sub-manifold of coupling constant space, we arrive at a very promising variational approximation method. (C) 1997 Elsevier Science B.V.
Keyword:
EXACT RENORMALIZATION-GROUP
FIELD-THEORIES
4 DIMENSIONS
MODEL
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期刊
IF:
4.5
论文数:
3.2W
被引数:
7.3W
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