Diffusers, potential slides, and surmountability

  • Eliazar I
  • Klafter J
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Abstract

A diffuser traversing an infinitely steep 'potential slide' might never overcome it. In such cases, the notion of First Passage Time - 'how long would it take till the diffuser surmounts the slide?' - is inadequate. Rather, the notion of relevance is that of Peak Height - 'how high-up the potential slide would the diffuser reach?'. Placing the 'potential slide' on the non-negative half-line, the Global Minimum attained by the diffuser's trajectory becomes a universal measure for the Peak Height. In this manuscript, the Global Minima of general diffuser systems on the non-negative half-line which are 'pushed away' from the origin are explored. We (i) compute the statistical distributions of the Global Minima; (ii) establish a reverse-engineering scheme which tells us how to design diffuser systems to obtain a pre-desired Global Minimum distribution; (iii) study the probabilistic limit-laws of the Global Minimum distributions; and (iv) characterize the class of diffuser systems with scale-free Global Minimum distributions. Lastly, we investigate the Global Minimum attained by an entire 'flock' of independent diffusers, whose initial locations are randomly scattered along the positive half-line. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Diffuser systems
  • Global minima
  • Limit-laws of global minimum distributions
  • Potential slides
  • Power laws
  • Reverse-engineering
  • Scale-free global minimum distributions
  • Surmountability

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Authors

  • Iddo Eliazar

  • Joseph Klafter

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