Journal
PHYSICAL REVIEW LETTERS
Volume 94, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.113003
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The short-time dynamics through a conical intersection of a macrosystem with a vast number of nuclear degrees of freedom (modes) is investigated. For convenience, the macrosystem is decomposed into a system carrying a few modes and a bath. By transforming the bath modes to new ones, it is shown that only three effective bath modes contribute to the conical intersection. They govern-together with the system's modes-the short-time dynamics of the macrosystem. The remaining bath modes do not directly couple the electronic states and become relevant at longer times. An extensive numerical example is presented.
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