One-electron propagation in Fermi, Pasta, Ulam disordered chains with Gaussian acoustic pulse pumping

L. D. da Silva (), J. L. L. dos Santos (), A. Ranciaro Neto, M. O. Sales and F. A. B. F. de Moura
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L. D. da Silva: Instituto de Física, Universidade Federal de Alagoas, Maceió AL 57072-970, Brazil
J. L. L. dos Santos: Instituto de Física, Universidade Federal de Alagoas, Maceió AL 57072-970, Brazil
A. Ranciaro Neto: Instituto de Física, Universidade Federal de Alagoas, Maceió AL 57072-970, Brazil†Faculdade de Economia, Administração e Contabilidade, Universidade Federal de Alagoas, Maceió AL 57072-970, Brazil
M. O. Sales: Instituto de Física, Universidade Federal de Alagoas, Maceió AL 57072-970, Brazil
F. A. B. F. de Moura: Instituto de Física, Universidade Federal de Alagoas, Maceió AL 57072-970, Brazil

International Journal of Modern Physics C (IJMPC), 2017, vol. 28, issue 08, 1-10

Abstract: In this work, we consider a one-electron moving on a Fermi, Pasta, Ulam disordered chain under effect of electron–phonon interaction and a Gaussian acoustic pulse pumping. We describe electronic dynamics using quantum mechanics formalism and the nonlinear atomic vibrations using standard classical physics. Solving numerical equations related to coupled quantum/classical behavior of this system, we study electronic propagation properties. Our calculations suggest that the acoustic pumping associated with the electron–lattice interaction promote a sub-diffusive electronic dynamics.

Keywords: Sub-diffusive spreading; electron–phonon coupling; wave packet dynamics; nonlinearity (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0129183117501005

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