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D.M. Leitner and P.G. Wolynes, “Quantization of the stochastic pump model of Arnold diffusion,” Phys. Rev. Lett. 79, 55 (1997); “Intramolecular energy flow in the condensed phase: effects of dephasing on localization in the quantum stochastic pump model,” Chem. Phys. Lett. 276, 289 (1997).