Maximum Quantum Entropy Method
Strongly Correlated Electrons
2018-11-05 v1
Abstract
Maximum entropy method for analytic continuation is extended by introducing quantum relative entropy. This new method is formulated in terms of matrix-valued functions and therefore invariant under arbitrary unitary transformation of input matrix. As a result, the continuation of off-diagonal elements becomes straightforward. Without introducing any further ambiguity, the Bayesian probabilistic interpretation is maintained just as in the conventional maximum entropy method. The applications of our generalized formalism to a model spectrum and a real material demonstrate its usefulness and superiority.
Cite
@article{arxiv.1804.01683,
title = {Maximum Quantum Entropy Method},
author = {Jae-Hoon Sim and Myung Joon Han},
journal= {arXiv preprint arXiv:1804.01683},
year = {2018}
}