Abstract
The effects of quantum lattice fluctuations on nonlinear optics in the Su-Schrieffer-Heeger (SSH) model are studied using the quantum Monte Carlo (QMC) method. We find that the magnitude of χ (3) is increased by a factor 18 by the quantum lattice fluctuations. This effect mainly comes from the quantum lattice fluctuations of charged soliton-antisoliton pairs.
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