quasi-particle number operator

例句：

1. 1.In quantum mechanics, the quasi-particle number operator is used to describe the behavior of particles in a system.
   在量子力学中，准粒子数算符被用来描述系统中粒子的行为。
2. 2.The quasi-particle number operator has been shown to be useful in predicting the behavior of materials under extreme conditions.
   准粒子数算符已被证明在预测材料在极端条件下的行为方面非常有用。
3. 3.The quasi-particle number operator has been applied to various fields, including materials science and physics.
   准粒子数算符已被应用于各个领域，包括材料科学和物理学。