Variational principle for quantum impurity systems in and out of equilibrium: Application to Kondo problems

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Authors: Yuto Ashida, Tao Shi, Mari Carmen Bañuls, J. Ignacio Cirac, Eugene Demler

Journal title: Physical Review B

Journal number: 98/2

Journal publisher: American Physical Society

Published year: 2018

DOI identifier: 10.1103/PhysRevB.98.024103

ISSN: 2469-9950