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Discrete breathers in the Peyrard-Bishop model of DNA

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Abstract

The Peyrard-Bishop model, which describes the dynamics of a DNA molecule, is considered. The solutions that represent discrete breathers are derived in the framework of the model. The dynamic stability of the stationary discrete breathers with respect to small perturbations is studied. The solutions can be interpreted as the experimentally observed opening of the base pairs in the DNA double strand at the initial stages of denaturation. It is also demonstrated that the model allows the existence of mobile breathers that move in the absence of perturbations in the environment. The interaction of the mobile breathers is numerically simulated. The Peierls-Nabarro barrier and the effective mass and velocity of the breather are estimated.

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Authors and Affiliations

  1. Bashkir State University, ul. Frunze 32, Ufa, 450074, Bashkortostan, Russia

    M. I. Fakhretdinov & F. K. Zakir’yanov

Authors
  1. M. I. Fakhretdinov
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  2. F. K. Zakir’yanov
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Correspondence to M. I. Fakhretdinov.

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Original Russian Text © M.I. Fakhretdinov, F.K. Zakir’yanov, 2013, published in Zhurnal Tekhnicheskoi Fiziki, 2013, Vol. 83, No. 7, pp. 1–5.

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Fakhretdinov, M.I., Zakir’yanov, F.K. Discrete breathers in the Peyrard-Bishop model of DNA. Tech. Phys. 58, 931–935 (2013). https://doi.org/10.1134/S1063784213070098

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  • DOI: https://doi.org/10.1134/S1063784213070098

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