Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 5: Ultracold Atoms: Manipulation and Detection

Q 5.8: Talk

Monday, March 14, 2011, 12:15–12:30, SCH 251

Coherent control of atoms using STIRAP: Two realistic systems. — •Tadhg Morgan, Brian O'Sullivan, and Thomas Busch — Physics Department, University College Cork, Co. Cork, Ireland

Developing strategies for coherent control of quantum states is one of the keys for successful engineering of quantum mechanical structures or quantum information processors in the future. Due to the fragile nature of quantum states these techniques need to be, most importantly, fault tolerant and lead to high fidelities. One class of techniques that can achieve this are so-called adiabatic techniques and their use in optical systems has been widely investigated in the past. Recently, it has been shown that similar techniques can, in principle, be used to prepare and process quantum states of single atoms and that, in particular, the counter-intuitive STIRAP process is an excellent candidate for the coherent movement of ultra-cold atoms. As atomic traps are currently not at the technologically advanced state where they can easily be moved in space we propose two realistic setups in which STIRAP can be observed, an atomchip with three current carrying wires and triple well radio frequency potential. We show that both systems provide high fidelity STIRAP and also that the radio frequency potential allows us to extend the application of the STIRAP technique a cloud of interacting atoms.