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The impurity Green's function Gf in the local non-Fermi liquid state isevaluated by means of the continuous-time quantum Monte Carlo method extendedto the multichannel Anderson model. For N=M (where N and M are numbers of spincomponents and channels, respectively), Gf is expressed as -Im Gf(w+i0) = c - b|w|^{1/2}, and the zero-frequency value c depends only on N (=M). Acorresponding impurity self-energy at low frequencies is composed of two parts:a resonance term related to c, and a non-Fermi liquid term proportional to|w|^{1/2}. The characteristic energy scale is discussed in terms of thenon-Fermi liquid term in the self-energy.

Continuous-Time Quantum Monte Carlo Study of Local Non-Fermi Liquid State in the Multichannel Anderson Model