najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2019-10-2-141-146najo-628Research ArticlePHYSICSФИЗИКАTemperature dependence of quantum correlations in 1D macromolecular chainsChizhovA. V.

Joliot-Curie, 6, Dubna, 141980 

Universitetskaya, 19, Dubna, 141980 

chizhov@theor.jinr.ruChevizovichD.

11001 Belgrade 

IvicZ.

11001 Belgrade 

Galovic´S.

11001 Belgrade 

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research ; Dubna State UniversityRussian FederationVinca Institute of Nuclear SciencesSerbia201912082025102141146Copyright © Chizhov A.V., Chevizovich D., Ivic Z., Galovic´ S., 20252025Chizhov A.V., Chevizovich D., Ivic Z., Galovic´ S.Chizhov A.V., Chevizovich D., Ivic Z., Galovic´ S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/628

We investigate the problem of generating quantum correlations between different sites of a macromolecular chain by vibronic excitation depending on the temperature. The influence of temperature on the model dynamics is taken into account by employing the partial-dressing method based on the modified LangFirsov unitary transformation under the assumption that the chain collective oscillations are in the thermal equilibrium state. To describe quantum correlations between the chain sites in the case of the initial single-vibronic excitation, we use two-time correlation functions of the second order and the logarithmic negativity as the degree of entanglement. We find that at certain temperatures for various model parameters time-stable entanglement can occur in the chain.

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The authors declare that there are no conflicts of interest present.