positive definite Hermitian operator

例句：

1. 1.In quantum mechanics, the positive definiteHermitian operator is used to describethe behavior of particles in a given state.
   在量子力学中，正定Hermitian算子用于描述粒子在给定状态下的行为。
2. 2. The positive definite Hermitianoperator is crucial for solving complex systems withmany degrees of freedom.
   正定Hermitian算子对于解决具有许多自由度的复杂系统至关重要。
3. 3. The positive definite Hermitian operator has been shown to be usefulin analyzing the properties of materials under variousconditions.
   正定Hermitian算子已被证明在分析材料在不同条件下的性质时非常有用。