Raman adiabatic transfer of optical states in multilevel atoms (7 pages)

J. Appel, Eden V. Figueroa, Frank Vewinger +2 more

Nikolay V. Vitanov

Giuseppe Della Valle, Marco Ornigotti, Toney Teddy Fernandez +4 more

We report on the experimental demonstration of adiabatic light transfer between the outer waveguides in a finite array of evanescently coupled optical waveguides with negligible excitation of all the intermediate waveguides. Such a counterintuitive light transfer scheme is an optical analogue of stimulated Raman adiabatic passage via an auxiliary dressed state proposed in atomic physics for multilevel systems.

J. Appel, Karl-Peter Marzlin, Alexander I. Lvovsky

We analyze electromagnetically induced transparency and light storage in an ensemble of atoms with multiple excited levels (multi-$\ensuremath{\Lambda}$ configuration) which are coupled to one of the ground states by quantized signal fields and to the other one via classical control fields. We present a basis transformation of atomic and optical states which reduces the analysis of the system to that of electromagnetically induced transparency in a regular three-level configuration. We demonstrate the existence of dark state polaritons and propose a protocol to transfer quantum information from one optical mode to another by an adiabatic control of the control fields.

杜炎雄 Du Yanxiong, 杨金波 Yang Jinbo, 吕庆先 Lü Qingxian +1 more

Suzanne McEndoo, Sarah Croke, J. Brophy +1 more

Adiabatic techniques using multilevel systems have recently been generalized from the optical case to settings in atom optics, solid state physics, and even classical electrodynamics. The most well known example of these is the so-called stimulated Raman adiabatic passage (STIRAP) process, which allows transfer of a particle between different states with large fidelity. Here we generalize and examine this process for an atomic center-of-mass state with a nontrivial phase distribution and show that even though dark state dynamics can be achieved for the atomic density, the phase dynamics will still have to be considered as a dynamical process. In particular we show that the combination of adiabatic and nonadiabatic behavior can be used to engineer phase superposition states.