Information-geometric approach to the renormalization group

authored by

Cédric Bény, Tobias J. Osborne

Abstract

We propose a general formulation of the renormalization group (RG) as a family of quantum channels which connect the microscopic physical world to the observable world at some scale. By endowing the set of quantum states with an operationally motivated information geometry, we induce the space of Hamiltonians with a corresponding metric geometry. The resulting structure allows one to quantify information loss along RG flows in terms of the distinguishability of thermal states. In particular, we introduce a family of functions, expressible in terms of two-point correlation functions, which are nonincreasing along the flow. Among those, we study the speed of the flow and its generalization to infinite lattices.

Organisation(s)

Institut für Theoretische Physik
Riemann Center for Geometry and Physics

Type

Artikel

Journal

Physical Review A - Atomic, Molecular, and Optical Physics

Volume

92

ISSN

1050-2947

Publication date

13.08.2015

Publication status

Veröffentlicht

Peer reviewed

Yes

ASJC Scopus Sachgebiete

Atom- und Molekularphysik sowie Optik

Electronic version(s)

https://doi.org/10.1103/PhysRevA.92.022330 (Access: Unbekannt)