An order parameter for impurity systems at quantum criticality

A quantum phase transition may occur in the ground state of a system at zero temperature when a controlling field or interaction is varied. The resulting quantum fluctuations which trigger the transition produce scaling behaviour of various observables, governed by universal critical exponents. A pa...

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Bibliographic Details
Main Authors: Bayat, Abolfazl, Johannesson, Henrik, Bose, Sougato, Sodano, Pasquale
Format: Online
Language:English
Published: Nature Pub. Group 2014
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4024739/