TY - JOUR
T1 - On the calculation of critical exponents by renormalisation group techniques
AU - Bruce, A. D.
AU - Droz, M.
AU - Aharony, A.
PY - 1974
Y1 - 1974
N2 - The application of renormalisation group recursion relations to the calculation of critical exponents in d dimensions to second order in epsilon =4-d is discussed. It is shown that in the limit of a large scale factor b, the fixed point value, u* of the four-spin coupling constant is correctly given to second order by a renormalisation group equation in which all irrelevant variables, mass renormalisation graphs, and mass terms in the propagators are ignored. Related approximations in the calculation of the critical exponents are justified. The unexpected equality to order epsilon 2 of u* and u0c, the Feynman graph coupling constant, is discussed.
AB - The application of renormalisation group recursion relations to the calculation of critical exponents in d dimensions to second order in epsilon =4-d is discussed. It is shown that in the limit of a large scale factor b, the fixed point value, u* of the four-spin coupling constant is correctly given to second order by a renormalisation group equation in which all irrelevant variables, mass renormalisation graphs, and mass terms in the propagators are ignored. Related approximations in the calculation of the critical exponents are justified. The unexpected equality to order epsilon 2 of u* and u0c, the Feynman graph coupling constant, is discussed.
UR - http://www.scopus.com/inward/record.url?scp=34247240686&partnerID=8YFLogxK
U2 - 10.1088/0022-3719/7/20/005
DO - 10.1088/0022-3719/7/20/005
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AN - SCOPUS:34247240686
SN - 0022-3719
VL - 7
SP - 3673
EP - 3685
JO - Journal of Physics C: Solid State Physics
JF - Journal of Physics C: Solid State Physics
IS - 20
M1 - 005
ER -