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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik

Q 15.83: Poster

Monday, March 14, 2011, 16:30–19:30, P1

Dynamical cooling of a single-reservoir open quantum system via optimal control — •Rebecca Schmidt, Jürgen T. Stockburger, and Joachim Ankerhold — Institut für Theoretische Physik, Universität Ulm, Albert Einstein-Allee 11, 89069 Ulm

The coherent optimal control of noisy and open quantum systems is critical in tailored-matter such as quantum information processing. We investigate this type of control problem using the exact description of the dynamics of open quantum systems given by stochastic Liouville- von Neumann equations [1], and generalizing Krotov’s iterative algorithm. We apply this formalism to an harmonic oszillator coupled to an ohmic bath. Performing optimal control on this system, allows us to cool translational motion with a single thermal reservoir and without involving internal degrees of freedom [2].

[1] Stockburger, J.T. and Grabert, H., Phys. Rev. Lett. 88, 170407 (2002)

[2] Schmidt, R., Negretti, A., Ankerhold, J., Calarco, T. and Stockburger, J.T., arXiv:1010.0940 (2010)