Monte Carlo reptation moves: Difference between revisions
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'''Reptation moves''' are also known as the "slithering snake" model. | '''Reptation moves''' are also known as the "slithering snake" model <ref>[http://dx.doi.org/10.1063/1.431268 Frederick T. Wall and Frederic Mandel "Macromolecular dimensions obtained by an efficient Monte Carlo method without sample attrition", Journal of Chemical Physics '''63''' pp. 4592-4595 (1975)]</ref>. It is particularly useful in [[Lattice simulations (Polymers) | lattice simulations]] of long chain molecules such as [[polymers]]. One [[Random numbers | randomly]] chooses one of the two ends to become the head of the snake. One then removes a piece of its tail, and after another random selection between freely available sites, one tacks on a new section to become the new head of the snake. For example: | ||
<br>:[[Image:Reptation.png|500px]]<br> | |||
If the position of the head is already occupied, the move is rejected. And, in order to avoid any bias, the head now becomes the tail in the next trial move. | |||
==See also== | ==See also== | ||
*[[Configurational bias Monte Carlo]] | *[[Configurational bias Monte Carlo]] | ||
==References== | ==References== | ||
<references/> | |||
[[category: monte Carlo]] | [[category: monte Carlo]] | ||
[[Category:Computer simulation techniques]] | [[Category:Computer simulation techniques]] | ||
Latest revision as of 15:37, 17 May 2010
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Reptation moves are also known as the "slithering snake" model [1]. It is particularly useful in lattice simulations of long chain molecules such as polymers. One randomly chooses one of the two ends to become the head of the snake. One then removes a piece of its tail, and after another random selection between freely available sites, one tacks on a new section to become the new head of the snake. For example:
:
If the position of the head is already occupied, the move is rejected. And, in order to avoid any bias, the head now becomes the tail in the next trial move.