Temperature dependence of quantum correlations in 1D macromolecular chains
https://doi.org/10.17586/2220-8054-2019-10-2-141-146
Abstract
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.
Supporting agencies: This work is partly supported by the bilateral project between the Serbian Ministry of Education and Science and “Theory of Condensed Matter” at JINR, Dubna, and by Serbian Ministry of Education and Science, under Contract Nos. III–45010 and III–45005.
About the Authors
A. V. Chizhov
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research ; Dubna State University
Russian Federation
Russian Federation
Joliot-Curie, 6, Dubna, 141980
Universitetskaya, 19, Dubna, 141980
D. Chevizovich
Vinca Institute of Nuclear Sciences
Serbia
Serbia
11001 Belgrade
Z. Ivic
Vinca Institute of Nuclear Sciences
Serbia
Serbia
11001 Belgrade
S. Galovic´
Vinca Institute of Nuclear Sciences
Serbia
Serbia
11001 Belgrade
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Review
For citations:
Chizhov A.V., Chevizovich D., Ivic Z., Galovic´ S. Temperature dependence of quantum correlations in 1D macromolecular chains. Nanosystems: Physics, Chemistry, Mathematics. 2019;10(2):141-146. https://doi.org/10.17586/2220-8054-2019-10-2-141-146
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