@article {35160,
	title = {A higher-order accurate operator splitting spectral method for the Wigner-Poisson system},
	journal = {Journal of Computational Electronics},
	volume = {21},
	year = {2022},
	pages = {756-770},
	abstract = {An accurate description of 2-D quantum transport in a double-gate metal oxide semiconductor field effect transistor (dgMOSFET) requires a high-resolution solver for a coupled system of the 4-D Wigner equation and 2-D Poisson equation. In this paper, we propose an operator-splitting spectral method to evolve such Wigner{\textendash}Poisson (WP) system in 4-D phase space with high accuracy. After the operator splitting of the Wigner equation, the resulting two sub-equations can be solved analytically with spectral approximation in phase space. Meanwhile, we adopt a Chebyshev spectral method to solve the Poisson equation. Spectral convergence in phase space and a fourth-order accuracy in time are both numerically verified. Finally, we apply the proposed solver to the simulation of a dgMOSFET, develop the steady states via long-time simulations and obtain numerically converged current{\textendash}voltage (I{\textendash}V) curves.},
	url = {https://doi.org/10.1007/s10825-022-01904-x},
	author = {Zhenzhu Chen and Haiyan Jiang and Sihong Shao}
}
