The second Vassiliev measure of uniform random walks and polygons in confined space
The second Vassiliev measure of uniform random walks and polygons in confined space
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有限空间中均匀随机游走和多边形的第二个 Vassiliev 测度
DOI:
10.1088/1751-8121/ac4abf
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Panagiotou, Eleni
中科院分区:
文献类型:
--
作者:
Smith, Philip;Panagiotou, Eleni
Biopolymers, like chromatin, are often confined in small volumes. Confinement has a great effect on polymer conformations, including polymer entanglement. Polymer chains and other filamentous structures can be represented by polygonal curves in three-space. In this manuscript, we examine the topological complexity of polygonal chains in three-space and in confinement as a function of their length. We model polygonal chains by equilateral random walks in three-space and by uniform random walks (URWs) in confinement. For the topological characterization, we use the second Vassiliev measure. This is an integer topological invariant for polygons and a continuous functions over the real numbers, as a function of the chain coordinates for open polygonal chains. For URWs in confined space, we prove that the average value of the Vassiliev measure in the space of configurations increases as O (n 2) with the length of the walks or polygons. We verify this result numerically and our numerical results also show that the mean value of the second Vassiliev measure of equilateral random walks in three-space increases as O (n). These results reveal the rate at which knotting of open curves and not simply entanglement are affected by confinement.
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DOI:
10.1088/0305-4470/27/10/006
发表时间:
1994
期刊:
Journal of Physics A
影响因子:
--
作者:
E. Orlandini;M. C. Tesi;S. Whittington;D. Sumners;E. J. J. Rensburg
通讯作者:
E. J. J. Rensburg
DOI:
10.1088/1751-8121/ac1fc2
发表时间:
2021
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
作者:
A. Xiong;A. J. Taylor;Mark R. Dennis;S. Whittington
通讯作者:
S. Whittington
DOI:
10.1016/0166-218x(89)90005-x
发表时间:
1989
期刊:
Discret. Appl. Math.
影响因子:
--
作者:
N. Pippenger
通讯作者:
N. Pippenger
DOI:
10.1515/9783110571493-010
发表时间:
2017
期刊:
The Journal of chemical physics
影响因子:
--
作者:
Y. Diao;C. Ernst;U. Ziegler;E. Rawdon
通讯作者:
E. Rawdon
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
E. Orlandini;E. J. J. Rensburg;M. C. Tesi;S. Whittington
通讯作者:
S. Whittington