Force-Induced Melting and Thermal Melting of a Double-Stranded Biopolymer

Details Force-Induced Melting and Thermal Melting of a Double-Stranded Biopolymer Force-Induced Melting and Thermal Melting of a Double-Stranded Biopolymer

2000-07-03

arxiv.org/abs/cond-mat/0007015v2

Physics

Condensed Matter

Soft Condensed Matter

Four pages in RevTex format, including two EPS figures; a new reference is added ([13]) and with other minor changes

Scientific paper

As a prototype of systems bearing a localization-delocalization transition, the strand-separation (melting) process in a double-stranded biopolymer is studied by a mapping to a quantum-mechanical problem with short-ranged potentials. Both the bounded and the extensive eigenmodes of the corresponding Schrodinger equation are considered and exact expressions for the configurational partition function and free energy are obtained. The force-induced melting is a first order phase transition process, while the thermal melting is found to be second order. Some scaling exponents governing thermal melting are given.

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