Abstract
We measure phase-dependent fluorescence spectra of two-level atoms driven by a monochromatic laser field, for off-resonance excitation. Pairs of spectra with phases of opposite sign are found to display striking differences that arise entirely from time ordering.
- Received 18 February 1997
DOI:https://doi.org/10.1103/PhysRevLett.79.613
©1997 American Physical Society