Title

Unitary integration of quantum liouville-bloch equations

Document Type

Article

Publication Date

11-30-1998

Abstract

The Liouville-Bloch equation for a general spin j in time-dependent external fields is solved as a unitary product of exponential operators. Operator noncommutativity is explicitly handled so as to leave behind a set of first-order differential equations for classical functions of time. Of these, only one is nontrivial and, once solved, the remaining yield to simple quadrature. Exact solutions or perturbative expansions of the classical equations can be used for analytical or numerical integration of the quantal equations. © 1998 American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

4785

Last Page

4789

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