Derivative expansion and renormalisation group flows

Details Derivative expansion and renormalisation group flows Derivative expansion and renormalisation group flows

2001-11-19

arxiv.org/abs/hep-th/0111159v1

JHEP 0111 (2001) 059

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 5 figures

Scientific paper

10.1088/1126-6708/2001/11/059

We study the convergence of the derivative expansion for flow equations. The convergence strongly depends on the choice for the infrared regularisation. Based on the structure of the flow, we explain why optimised regulators lead to better physical predictions. This is applied to O(N)-symmetric real scalar field theories in 3d, where critical exponents are computed for all N. In comparison to the sharp cut-off regulator, an optimised flow improves the leading order result up to 10%. An analogous reasoning is employed for a proper time renormalisation group. We compare our results with those obtained by other methods.

Affiliated with

Also associated with

No associations

Rating

Derivative expansion and renormalisation group flows does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Derivative expansion and renormalisation group flows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Derivative expansion and renormalisation group flows will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-394693