The thermal denaturation of Peyrard-Bishop model with an external potential

Abstract

The impact of various types of external potentials to the Peyrard-Bishop DNA denaturation is investigated through statistical mechanics approach. The partition function is obtained using transfer integral method, and further the stretching of hydrogen bond is calculated using time independent perturbation method. It is shown that all types of external potentials accelerate the denaturation processes at lower temperature. In particular, it is argued that the Gaussian potential with infinitesimal width reproduces a constant force at one end of DNA sequence as already done in some previous works.

arXiv comment11 pages

References in corpus (5)

• Denaturation transition of stretched DNA
• Mechanical denaturation of DNA: existence of a low temperature denaturation
• Statistical Theory of Force Induced Unzipping of DNA
• Local phase space control and interplay of classical and quantum effects in dissociation of a driven Morse oscillator
• Shear Unzipping of DNA

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• Twisting short dsDNA with applied tension
• First-passage probability: a test for DNA Hamiltonian parameters
• Mesoscopic helical models for DNA
• Twist-stretch relations in nucleic acids
• Statistical method for A-RNA and B-DNA