Excitonic Bloch equations for a two-dimensional system of interacting excitons
Excitonic Bloch equations for a two-dimensional system of interacting excitons
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相互作用激子二维系统的激子布洛赫方程
DOI：
10.1103/physrevb.61.13856
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发表时间：
2000
影响因子：
3.7
通讯作者：
G. Rochat
中科院分区：
文献类型：
--
作者：
C. Ciuti;V. Savona;C. Piermarocchi;A. Quattropani;P. Schwendimann;G. Rochat
我们推导出有效的玻色哈密顿系统的相互作用激子应用的Tavani变换。费米子的非线性一致包括在内，导致密度依赖修正的动力学哈密顿量和激子振子强度的饱和。由于库仑相互作用的激子-激子相互作用势的计算，占自旋依赖性。从有效哈密顿量出发，得到了激子布洛赫方程。作为第一个应用，我们研究了量子威尔斯阱中激子拉比振荡的问题。
We derive the effective Bose Hamiltonian for a system of interacting excitons applying the Usui transformation. The fermionic nonlinearities are consistently included, leading to a density dependent correction to the kinetic Hamiltonian and to a saturation of the exciton oscillator strength. The exciton-exciton interaction potentials due to the Coulomb interaction are calculated, accounting for the spin dependence. Starting from the effective Hamiltonian, we obtain the excitonic Bloch equations. As a first application, we study the problem of excitonic Rabi oscillations in quantum wells.