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Quantum entanglement between amide-I and amide-site in Davydov-Scott model

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Abstract

In this paper, we firstly derive non-Markovian operator Langevin equations of the Davydov monomer in its environment. Next, we replace the equations with the c-number quantum general Langevin equations (QGLEs) by calculating statistical and quantum averages of the operator Langevin equations. Then, by using the c-number QGLEs we investigate the evolutions of the subsystems amide-I and amide-site. The evolution of a parameter θ describing quantum entanglement of the coupling subsystems with continuous variable Hamiltonian has also been investigated. It is shown that there is certain entanglement between the amide-I and amide-site in the Davydov-Scott monomer.

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Authors and Affiliations

  1. Department of Physics and Institute of Optics, Ningbo University, Ningbo, 315211, P.R. China

    Xian-Ting Liang

  2. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P.R. China

    Heng Fan

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  1. Xian-Ting Liang
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  2. Heng Fan
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Correspondence to Xian-Ting Liang.

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Liang, XT., Fan, H. Quantum entanglement between amide-I and amide-site in Davydov-Scott model. Eur. Phys. J. D 68, 13 (2014). https://doi.org/10.1140/epjd/e2013-40463-0

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