Quantum renormalization group
High Energy Physics - Theory
2016-02-17 v2
Abstract
The observed IR and the spectator UV particles of a regulated, cutoff quantum field theory are entangled by their interactions; hence, the IR sector can be described by the help of the density matrix only. The tree-level renormalized trajectory is obtained for a self-interacting scalar field theory, containing the mixed state contributions. One needs a sharp cutoff in the momentum space as regulator to realize the true loss of information, caused by massive particles.
Cite
@article{arxiv.1508.04277,
title = {Quantum renormalization group},
author = {S. Nagy and J. Polonyi and I. Steib},
journal= {arXiv preprint arXiv:1508.04277},
year = {2016}
}
Comments
Extended, final version, to appear in Phys. Rev. D