Coarse grained open system quantum dynamics

Journal Article · Fri Nov 21 00:00:00 EST 2008 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.3010370· OSTI ID:21254902

Thanopulos, Ioannis ^[1]; Brumer, Paul ^[2]; Shapiro, Moshe ^[1]

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1. Department of Chemistry, University of British Columbia, Vancouver V6T 1Z3 (Canada)
2. Chemical Physics Theory Group, Department of Chemistry, and Center of Quantum Information and Quantum Control, University of Toronto, Toronto, Ontario M5S 3H6 (Canada)

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.

• OSTI ID: 21254902
• Journal Information: Journal of Chemical Physics, Vol. 129, Issue 19; Other Information: DOI: 10.1063/1.3010370; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGEBRA
CALCULATION METHODS
MATRICES
MOLECULES
SCHROEDINGER EQUATION