The electron an d current densities, defined by the solution of the Schr?dinger system, converge to a solution of the compressible Euler equation with nonlinear pressure.

• 由量子力学中的薛定谔方程的解所定义的电子密度和电流密度当Planck常数趋于零时收敛于古典力学中的非线性可压缩欧拉方程的解。