Berlin 2015 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 25: Brownian Motion and Transport (jointly with DY, CPP)
TT 25.11: Vortrag
Montag, 16. März 2015, 18:00–18:15, BH-N 243
Charged transfer in a dynamical Landau-Zener Model: Application in QCA — •Alejandro Santana-Bonilla1, Mirna Kramar1, Rafael Gutierrez1,2, and Giovanni Cuniberti1,2 — 1Technische Universität Dresden Faculty of Mechanical Science and Engineering Institute for Materials Sciences — 2Max Bergmann Center of Biomaterials
The development of molecular based quantum cellular automata (mQCA) would open the possibility to low-dissipation information processing. One key parameter in the mQCA paradigm is the stability of intra-molecular charge transfer, which guarantees the association of *1* and *0* to two different charge configurations in the mQCA building cell. Especifically, a given charge configuration needs to be stable against thermal fluctuations. Also important is how the mQCA charge state reacts to an external driver with a given time-dependence. In this study we present a theoretical study based on the solution of the time-dependent Schrödinger equation to describe intra-molecular charge transfer in an effective model of an mQCA cell under the action of a time-dependent driver field and including thermal fluctuations. The model is parametrized via first-principle calculations in a toy molecular system able to catch the minimal requirements of a m-QCA cell