Non-linear doublon production in a Mott insulator

Details Non-linear doublon production in a Mott insulator Non-linear doublon production in a Mott insulator

2011-05-16

arxiv.org/abs/1105.3145v4

Physics

Condensed Matter

Strongly Correlated Electrons

5pages, 3 figures (revised version)

Scientific paper

We theoretically study the production of doublon-hole pairs in a Mott insulator in strong off-resonant electric fields which takes place due to non-linear effects, i.e., multi-photon absorption and quantum tunneling. This is a many-body extension of Keldysh's ionization theory and the Schwinger mechanism in non-linear QED, and is applied to the one dimensional Hubbard model by combining Bethe ansatz with Landau-Dykhne's quantum tunneling theory. Using this scheme, we show that the distribution of doublon-hole pairs depend on the laser photon energy drastically which may lead to a way of controlling photo-induced phase transitions in pump-probe experiments. We also compare the results with time dependent DMRG.

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