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Optimized hierarchical equations of motion for Drude dissipation

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arxiv 1107.0249 v1 pith:TXFK7TIC submitted 2011-07-01 quant-ph cond-mat.stat-mech

classification quant-phcond-mat.stat-mech
keywords hierarchicalconvergencecriteriondissipationdrudeequationsmotionoptimized
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The hierarchical equations of motion theory for Drude dissipation is optimized, with a convenient convergence criterion proposed in advance of numerical propagations. The theoretical construction is on basis of a Pad\'{e} spectrum decomposition that has been qualified to be the best sum-over-poles scheme for quantum distribution function. The resulting hierarchical dynamics under the {\em apriori} convergence criterion are exemplified with a benchmark spin-boson system, and also the transient absorption and two-dimensional spectroscopy of a model exciton dimer system.

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