Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-03-22
Phys.Rev. D64 (2001) 105007
Physics
High Energy Physics
High Energy Physics - Theory
35 pages, 3 figures, explanations and two references added, abstract streamlined, to appear in PRD
Scientific paper
10.1103/PhysRevD.64.105007
We study the optimisation of exact renormalisation group (ERG) flows. We explain why the convergence of approximate solutions towards the physical theory is optimised by appropriate choices of the regularisation. We consider specific optimised regulators for bosonic and fermionic fields and compare the optimised ERG flows with generic ones. This is done up to second order in the derivative expansion at both vanishing and non-vanishing temperature. We find that optimised flows at finite temperature factorise. This corresponds to the disentangling of thermal and quantum fluctuations. A similar factorisation is found at second order in the derivative expansion. The corresponding optimised flow for a ``proper-time renormalisation group'' is also provided to leading order in the derivative expansion.
No associations
LandOfFree
Optimised 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 Optimised Renormalisation Group Flows, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimised Renormalisation Group Flows will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-192856