Creation of arbitrary coherent superposition states by stimulated Raman adiabatic passage
- Fachbereich Physik der Universitaet Kaiserslautern, 67653 Kaiserslautern (Germany)
- Department of Physics, Sofia University, James Bourchier 5 boulevard, 1164 Sofia (Bulgaria)
- H.A.S. Research Institute for Solid State Physics and Optics, H-1525 Budapest, P. O. Box 49 (Hungary)
A technique for creation of well-defined preselected coherent superpositions of multiple quantum states is proposed. It is based on an extension of the technique of stimulated Raman adiabatic passage (STIRAP) to degenerate levels. As an example, the nine-state system composed of the magnetic sublevels of three levels with angular momenta J{sub g}=0, J{sub e}=1, and J{sub f}=2 is studied in detail. Starting from the |J{sub g}=0,M{sub g}=0> state, STIRAP can create an arbitrary preselected coherent superposition between the five M{sub f} sublevels (M{sub f}=-2,-1,0,+1,+2) of the J{sub f}=2 level with 100% efficiency in the adiabatic limit. The populations and the phases of the M{sub f} states in this superposition are determined entirely by the polarizations of the two laser fields. It is shown that this technique allows one to create any superposition of the five M{sub f} states, that is, to reach any point in the Hilbert space of the J{sub f}=2 manifold, and the corresponding recipes for choosing the laser polarizations are presented.
- OSTI ID:
- 20718572
- Journal Information:
- Physical Review. A, Vol. 72, Issue 3; Other Information: DOI: 10.1103/PhysRevA.72.033403; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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