Phys. Rev. E 66, 066612 (2002) [4 pages]Alternative paradigm for physical computingReceived 25 June 2002; published 30 December 2002 We identify a different class of physical systems that are able to form universal logic gates. By analogy with Si(100) surface dimers, we present a model to analyze the trajectories of the fixed points (interpreted as logic states) under variation of the basic parameters. Using the perspective of catastrophe theory, we show that information processing is the result of cycling the parameters of such systems through a path containing a cusp-type catastrophe. We apply this analysis to the construction of an example based on magnetic memory. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.66.066612
DOI:
10.1103/PhysRevE.66.066612
PACS:
45.05.+x, 89.20.Ff, 85.70.Ay
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