Heidelberg 2015 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 5: Posters 1: Novelties in Molecular Physics

MO 5.8: Poster

Montag, 23. März 2015, 17:00–19:00, C/Foyer

Realization of Ultrafast Logic Gate for Reversible Computation by Nonlinear Optical Techniques — •Mehdi Mohammad Kazemi, Alireza Mazeheri Tehrani, Tahir Zeb Khan, and Arnulf Materny — Jacobs University, Campus Ring 1, 28759 Bremen, Germany

A Toffoli gate (CCNOT gate) is a universal reversible logic gate, from which all other reversible gates can be constructed. It has a three-bit input and output. The goal of our work was to realize a Toffoli gate where all inputs and outputs are realized optically, which allows for ultrafast switching processes. We demonstrate experimentally that a Toffoli logic gate can be based on nonlinear multi-wave interactions of light with matter. Using femtosecond laser pulses, the all-optical Toffoli gate is making use of the coherence of the optical signal produced via the nonlinear optical process. Sum frequency (SF) and second harmonic (SH) generations are combined in such a way so as to yield the complete truth table of the universal reversible logic gate.