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Updated: Aug 3, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
Numerical method for coherent electron dynamics with position-dependent effective-mass distributions in semiconductor
Taro Ando1, Yoshiyuki Ohtake, Naoki Ohtani
1The 1st Research Group, Central Research Laboratory, Hamamatsu Photonics K. K., 5000 Hirakuchi, Hamamatsu-City, Shizuoka, 434-8601, Japan. taro@crl.hpk.co.jp
Abstract:
We develop a numerical scheme for solving the time-dependent Kohn-Sham equation in semiconductor heterostructures. Based on the efficient and accurate method recently proposed by Watanabe and Tsukada [Phys. Rev. E 65, 036705 (2002)], an extension is made for treating effective-mass mismatch between different semiconductor materials. A demonstrative calculation shows that the energy of the quantum-well state is accurately conserved during the time-evolution calculation with the present method. Examples under the existence of Hartree and exchange-correlation interactions are also shown as demonstrations of nonlinear electron dynamics in quantum wells. The present method is particularly useful for analyzing nonlinear coherent charge oscillations in semiconductor quantum wells, taking into account many-body effects.
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