Performance of Magnetic Quantum Cellular Automata and Limitations due to Thermal Noise

Details Performance of Magnetic Quantum Cellular Automata and Limitations due to Thermal Noise Performance of Magnetic Quantum Cellular Automata and Limitations due to Thermal Noise

2009-06-29

arxiv.org/abs/0906.5172v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

22 pages, 8 figures

Scientific paper

Operation parameters of magnetic quantum cellular automata are evaluated for the purposes of reliable logic operation. The dynamics of the nanomagnets is simulated via the Landau-Lifshitz-Gilbert equations with a stochastic magnetic field corresponding to thermal fluctuations. It is found that in the macrospin approximation the switching speed does not change under scaling of both size and distances between nanomagnets. Thermal fluctuations put a limitation on the size of nanomagnets, since the gate error rate becomes excessive for nanomagnets smaller than 200nm at room temperature.

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