Those of you who find strong-field light-matter interaction intriguing should enjoy the talk “Enhancement of Zener tunneling rate via electron-hole attraction within a time-dependent quasi-Hartree-Fock theory” by Dr. Yasushi Shinohara from NTT Basic Research Laboratories on Monday, July 3rd, at 1:30 pm.
Here is what you can expect: Carrier generation by a strong field is the first step in all extreme nonlinear optics. The tunneling picture is valid for carrier generation as long as the electric field changes slowly, so that the Keldysh parameter has a low value. Most studies of the tunneling process in extended systems are based on the rigid-band structure, i.e. without electron-hole interaction. We have developed a theoretical framework for the electron quantum dynamics in the extended systems with explicit electron-hole interaction by solving the time-dependent quasi-Hartree-Fock equation. The tunneling rate is evaluated by how fast the number of excited electrons grows under a static electric field. By comparing numerical simulations with and without electron-hole interaction, we determine an enhancement factor for the tunneling rate due to the interaction. Our simulations show that this factor is in most cases larger than 1 and depends on the field strength.
The talk will take place at MPQ in the Hebert-Walther seminar room.
