Maximum quantum entropy method

Article

关键词: MONTE-CARLO DATA;    ANALYTIC CONTINUATION;    CONVERGENCE ACCELERATION;    STOCHASTIC METHOD;    HUBBARD-MODEL;    DIMENSIONS;   

DOI  :  10.1103/PhysRevB.98.205102

来源: SCIE

【 摘 要 】

A maximum entropy method for analytic continuation is extended by introducing quantum relative entropy. This 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.

【 授权许可】

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