COMBINING MCRG AND FOURIER ACCELERATED LANGEVIN ALGORITHM

.E.C.M .E. W e study the im plem entation ofM onte Carlo renorm alization group (M CRG )in m om entum space. This technique is m ost e(cid:14) cient when used in com bination with a Fourier accelerated Langevin algorithm . A s a benchm ark we calculate the criticalexponents (cid:23) and (cid:17) in the vicinity of both the gaussian and the W ilson (cid:12) xed point in (cid:21)(cid:30) 43 . The results are very com petitive with alternative analytical m ethods and require a m oderate com putationale(cid:11) ortonly.