Abstract
We consider the origin and implications of the phase lag, an observable in two-pathway excitation schemes whose recent measurement raised both interest and controversy. A closed-form expression is derived which illustrates the various sources of a nonvanishing phase lag, distinguishes their roles and exposes their unifying feature. Several formally interesting and experimentally relevant limits of the general form are considered and the potential application of phase-sensitive measurements as a route to understanding molecular coupling mechanisms is illustrated.
Original language | English (US) |
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Pages (from-to) | 9168-9182 |
Number of pages | 15 |
Journal | Journal of Chemical Physics |
Volume | 111 |
Issue number | 20 |
DOIs | |
State | Published - Nov 22 1999 |
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry