CT-X: An efficient continuous-time quantum Monte Carlo impurity solver in Kondo Regime

Changming Yue, Yilin Wang, Junya Otsuki, Xi Dai

Research output: Contribution to journalArticlepeer-review

Abstract

In the present paper, we present an efficient continuous-time quantum Monte Carlo impurity solver with high acceptance rate at low temperature for multi-orbital quantum impurity models with general interaction. In this hybridization expansion impurity solver, the imaginary time evolution operator for the high energy multiplets, which decays very rapidly with the imaginary time, is approximated by a probability normalized δ-function. As the result, the virtual charge fluctuations of fn→ f n±1are well included on the same footing without applying Schrieffer-Wolff transformation explicitly. As benchmarks, our algorithm perfectly reproduces the results for both Coqblin-Schriffeer and Kondo lattice models obtained by CT-J method developed by Otsuki et al. Furthermore, it allows capturing low energy physics of heavy-fermion materials directly without fitting the exchange coupling J in the Kondo model.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - May 21 2018
Externally publishedYes

ASJC Scopus subject areas

  • General

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