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Vortex Cellular Automata and Logic Devices

With the advances in nanoscale fabrication and control, new kinds of nanoscale devices can now be considered. One promising example has been quantum dot cellular automata where the locations of just one or two charges can be used to represent 0 or 1 for the basic building block for logic devices. We have been considering a similar approach with superconducting vortices in nanostructured arrays to creat vortex cellular automata. In addition to new types of logic circuits, we have also been considering new types of mechanical devices such as gears. In addition to the technological applications, there are also many scientific issues that we are exploring in these systems such as using various types of deterministic ratchets for soliton propagation. This work is being performed in collaboration with Prof. Boldizsar Janko (Notre Dame), Prof. Vitali Metlushko (UIC), the Materials Science Division at Argonne, Dr. Charles Reichhardt (LANL), and Dr. Matthew Hastings (LANL).


Papers:

  1. Ratchet Cellular Automata
    M.B. Hastings, C.J. Olson Reichhardt, and C. Reichhardt
    Phys. Rev. Lett. 90, 247004 (2003).
    Online version
    View movies
    Physical Review Focus article
    TRNmag.com article

  2. Ratchet superconducting vortex cellular automata
    C.J. Olson Reichhardt, C. Reichhardt, M.B. Hastings, and B. Janko
    Physica C 404, 266 (2004).
    Online version

  3. Ratchet Cellular Automata for colloids in dynamic traps
    C.J. Olson Reichhardt and C. Reichhardt
    cond-mat/0602290
    Europhys. Lett. 74, 792 (2006).

Experimental realization of RCA:

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