Abstract
We develop a continuous-time quantum Monte Carlo method based on a strong-coupling expansion for Anderson impurity models with phonon-assisted hybridizations for arbitrary number of phonon modes. As a benchmark, we investigate the two-channel Anderson model with a single phonon, and numerically demonstrate that an SO(5) susceptibility composed of localized-electron charge and phonon-parity operators diverges logarithmically at non-Fermi liquid critical points in the model, which verifies the predictions by the boundary conformal field theory [K. Hattori: Phys. Rev. B 85 (2012) 214411].
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