Randomly charged polymers: An exact enumeration study
نویسندگان
چکیده
منابع مشابه
Randomly charged polymers, random walks, and their extremal properties.
Motivated by an investigation of ground state properties of randomly charged polymers, we discuss the size distribution of the largest Q–segments (segments with total charge Q) in such N–mers. Upon mapping the charge sequence to one–dimensional random walks (RWs), this corresponds to finding the probability for the largest segment with total displacement Q in an N–step RW to have length L. Usin...
متن کاملRandomly Charged Polymers: Excess Charge Dependence of Spatial Configurations
Spatial configurations of randomly charged polymers, known as polyampholytes (PAs), are very sensitive to the overall excess charge Q. Analytical arguments, supported by Monte Carlo simulations and exact enumeration studies, lead to the following picture: For Q < Qc ≈ q0 √ N (q0 is the elementary charge, N is the number of monomers in the polymer), the radius of gyration Rg of the polymer decre...
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Distance-hereditary graphs form an important class of graphs, from the theoretical point of view, due to the fact that they are the totally decomposable graphs for the split-decomposition. The previous best enumerative result for these graphs is from Nakano et al. (J. Comp. Sci. Tech., 2007), who have proven that the number of distancehereditary graphs on n vertices is bounded by 2d3.59ne. In t...
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The interplay of topological constraints and Coulomb interactions in static and dynamic properties of charged polymers is investigated by numerical simulations and scaling arguments. In the absence of screening, the long-range interaction localizes irreducible topological constraints into tight molecular knots, while composite constraints are factored and separated. Even when the forces are scr...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 1995
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.52.835