Non-perturbative approach to backscattering off a dynamical impurity in 1D Fermi systems

Details Non-perturbative approach to backscattering off a dynamical impurity in 1D Fermi systems Non-perturbative approach to backscattering off a dynamical impurity in 1D Fermi systems

2005-03-16

arxiv.org/abs/cond-mat/0503395v2

Phys. Rev. B72, 235112 (2005).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures, RevTex4. Appendix and some text added. Results and conclusions did not change. Version accepted for public

Scientific paper

10.1103/PhysRevB.72.235112

We investigate the problem of backscattering off a time-dependent impurity in a one-dimensional electron gas. By combining the Schwinger-Keldysh method with an adiabatic approximation in order to deal with the corresponding out of equilibrium Dirac equation, we compute the total energy density (TED) of the system. We show how the free fermion TED is distorted by the backscattering amplitude and the geometry of the impurity.

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