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Q: Quantenoptik
Q 16: Nonlinear Optics II
Q 16.6: Vortrag
Dienstag, 3. April 2001, 18:45–19:00, H 2013
Two-photon coherent control of atomic collisions with non-classical light — •D.V. Kupriyanov1, M.D. Havey2, A.V. Slavgorodski1, and I.M. Sokolov1 — 1Department of Theoretical Physics, State Technical University, 195251 St.-Petersburg — 2Physics Department Old Dominion University Norfolk, Virginia 23529
Significant developments in studies of non-classical properties of light have now promised realization of practical applications in the area of quantum information. In this presentation we would like to point out that in traditional and practically important spectroscopic studies based on the optical control of the elementary photochemical processes such as half collisions (photodissociation) or fractional collisions (two- or many-photon optical collisions) there is also good outlook for the implementation of the quantum properties of light, such as squeezing or entanglement. The general idea and basic principles for coherent control of atomic collisions using a parametric light source with entangled polarization have recently been proposed in Havey, et al. [Phys. Rev. Lett. 84, 3823 (2000)]. We show that, for the case of two-photon excitation when the photon pair exists in a cooperative quantum state with entangled polarization, the dynamics of a fractional collision significantly differs from the corresponding "classical" prediction. In particular, there is a strong interference of photon "quantum" correlations with correlations arising from internal collisional dynamics. We illustrate the essential effects qualitatively in a quasistatic recoil limit approximation of the atomic collision as well as by full numerical simulations of the process.