Photoinduced coherent oscillations in the one-dimensional two-orbital Hubbard model

Details Photoinduced coherent oscillations in the one-dimensional two-orbital Hubbard model Photoinduced coherent oscillations in the one-dimensional two-orbital Hubbard model

2010-11-26

arxiv.org/abs/1011.5701v1

Phys. Rev. B 82, 161105(R) (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures

Scientific paper

10.1103/PhysRevB.82.161105

We study photoinduced ultrafast coherent oscillations originating from orbital degrees of freedom in the one-dimensional two-orbital Hubbard model. By solving the time-dependent Schr\"odinger equation for the numerically exact many-electron wave function, we obtain time-dependent optical response functions. The calculated spectra show characteristic coherent oscillations that vary with the frequency of probe light. A simple analysis for the dominant oscillating components clarifies that these photoinduced oscillations are caused by the quantum interference between photogenerated states. The oscillation attributed to the Raman-active orbital excitations (orbitons) clearly appears around the charge-transfer peak.

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