| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Further Discussion on Polaron Existence in Dry DNA |
| LI Xiao-Hong1, ZHANG Yu-Yu2, LIU Tao1, WANG Ke-Lin1,3 |
| 1School of Science, Southwest University of Science and Technology, Mianyang 6210102Department of Physics, Zhejiang University, Hangzhou 3100273School of Physics, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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LI Xiao-Hong, ZHANG Yu-Yu, LIU Tao et al 2009 Chin. Phys. Lett. 26 128701 |
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Abstract We study the interaction between holes and molecular vibrations on dry DNA by using the extended Firsov's model. The ground state energy, calculated by using two Hilbert spaces, Fock state space and coherent state space, is confirmed. The polaron binding energy, defined with the ground state energy, is 0.014eV, much less than the thermal energy 0.026eV at room temperature 300K, which means that polarons are difficult to form self-trapping at room temperature and Anderson localization will prevent a metallic state on dry DNA. The results are consistent with the available experiments.
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| Keywords:
87.14.Gk
87.15.AG
03.65.Ge
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Received: 20 July 2009
Published: 27 November 2009
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