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Coarse grained open system quantum dynamics
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DOI：10.1063/1.3010370.png)
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Abstract
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We show that the quantum dynamics of a system comprised of a subspace Q coupled to a larger subspace P can be recast as a reduced set of coarse grained ordinary differential equations with constant coefficients. These equations can be solved by a single diagonalization of a general complex matrix. The method makes no assumptions about the strength of the couplings between the Q and the P subspaces, nor is there any limitation on the initial population in P. The utility of the method is demonstrated via computations in three following areas: molecular compounds, photonic materials, and condensed phases.
Keywords:
differential equations
matrix algebra
quantum theory
Schrodinger equation
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