期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.037801
关键词
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资金
- National Research Foundation Singapore
- National Science Foundation [1335938]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1335938] Funding Source: National Science Foundation
Recent theoretical progress has explained the physics of knotting of semiflexible polymers, yet knotting of flexible polymers is relatively unexplored. We herein develop a new theory for the size distribution of knots on a flexible polymer and the existence of metastable knots. We show the free energy of a flexible molecule in a tube can be mapped to quantitatively reproduce the free energy distribution of a knot on a flexible chain. The size distribution of knots on flexible chains is expected to be universal and might be observed at a macroscopic scale, such as a string of hard balls.
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