Journal
PHYSICS LETTERS B
Volume 779, Issue -, Pages 436-440Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2018.02.034
Keywords
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Funding
- RIKEN iTHES Program
- RIKEN iTHEMS Program
- NSF [PHY1066292, PHY1607611]
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Deriving accurate energy density functional is one of the central problems in condensed matter physics, nuclear physics, and quantum chemistry. We propose a novel method to deduce the energy density functional by combining the idea of the functional renormalization group and the Kohn-Sham scheme in density functional theory. The key idea is to solve the renormalization group flow for the effective action decomposed into the mean-field part and the correlation part. Also, we propose a simple practical method to quantify the uncertainty associated with the truncation of the correlation part. By taking the phi(4) theory in zero dimension as a benchmark, we demonstrate that our method shows extremely fast convergence to the exact result even for the highly strong coupling regime. (C) 2018 The Author(s). Published by Elsevier B.V.
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