Nonperturbative Coherent Population Trapping: An Analytic Model
Abstract
Coherent population trapping is shown to occur in a driven symmetric double-well potential in the strong-field regime. The system parameters have been chosen to reproduce the 0-<-->3+ transition of the inversion mode of the ammonia molecule. For a molecule initially prepared in its lower doublet we find that, under certain circumstances, the 3+ level remains unpopulated, and this occurs in spite of the fact that the laser field is resonant with the 0-<-->3+ transition and intense enough so as to strongly mix the 0+ and 0- ground states. This counterintuitive result constitutes a coherent population trapping phenomenon of nonperturbative origin which cannot be accounted for with the usual models.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2002
- DOI:
- 10.1103/PhysRevLett.88.053603
- arXiv:
- arXiv:quant-ph/0306164
- Bibcode:
- 2002PhRvL..88e3603D
- Keywords:
-
- Quantum Physics;
- Condensed Matter - Other Condensed Matter;
- Physics - Chemical Physics
- E-Print:
- 5 pages, 2 figures