Berlin 2014 – scientific programme

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SYQS: Symposium Characterization and control of complex quantum systems

SYQS 2: Characterization and control of complex quantum systems II

SYQS 2.3: Talk

Friday, March 21, 2014, 14:45–15:00, Audimax

Cooperative effects of external control and dissipation in open quantum systems — •Rebecca Schmidt, Jürgen T. Stockburger, and Joachim Ankerhold — Institut für Theoretische Physik, Universität Ulm, Albert Einstein-Allee 11, 89069 Ulm

Coherent optimal control of non-Markovian open quantum systems is crucial in tailored-matter such as quantum information processing. In general, the presence of dissipative reservoirs is considered as detrimental to quantum coherence and entanglement. However, tailored control pulses [1] may change the role of a heat bath from being destructive on quantum resources to an asset promoting them. Here we show that the cooperative interplay between optimal control signals and a dissipative medium may indeed induce phenomena such as entropy reduction (cooling) [1,2] and creation of bi-partite entanglement [3].

[1] R. Schmidt, A. Negretti, J. Ankerhold, T. Calarco and J.T. Stockburger, PRL 107, 130404 (2011)

[2] R. Schmidt, S. Rohrer, J.T. Stockburger and J. Ankerhold, Phys. Scr. T151, 014034 (2012)

[3] R. Schmidt, J.T. Stockburger, and J. Ankerhold, PRA 88, 052321 (2013)