Quantum renormalization group

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.

Extended, final version, to appear in Phys. Rev. D

References in corpus (7)

• Exact evolution equation for the effective potential
• Nonthermal fixed points and the functional renormalization group
• Real time correlation functions and the functional renormalisation group
• From quantum to classical dynamics: The relativistic $O(N)$ model in the framework of the real-time functional renormalization group
• Quantum-classical crossover in electrodynamics
• Classical and quantum effective theories
• Inflation and nonequilibrium renormalization group

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• Quantum-classical transition in the Caldeira-Leggett model
• Renormalization-Group Running Induced Cosmic Inflation
• Renormalization of the bilocal sine-Gordon model