Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 29: Poster Session: Quantum Information Systems, Quantum Coherence (jointly with SAMOP)

TT 29.2: Poster

Tuesday, March 15, 2011, 18:00–21:00, P1

The effect of solid-state noise sources on three-level systems — •Nicolas Vogt¹, Michael Marthaler¹, Jared H. Cole¹, and Gerd Schön^1,2 — ¹Institut für Theoretische Festkörperphysik, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany — ²DFG Forschungszentrum Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany

We investigate the behaviour of a three level quantum system in contact with a two level fluctuator. There are a number of established ways to treat the TLF as a noise source and obtain an equation of motion for the three level system, for example Bloch-Redfield theory. We compare such perturbative methods with the fully coherent treatment of the TLF in a parameter regime where the assumptions made in the derivation of these perturbative methods are no longer guaranteed to hold. Using these results, we consider the effect of intrinsic decoherence sources on the process of stimulated Raman adiabatic passage, within a three-level system.