a unitary operator的用法和样例：
- The ground state energy of surface magnetopolarons is derived b y the method of a linear combination operator and a unitary transformation.
- Besides, it suggests that Afghanistan cannot be a unitary state.
- Established a unitary distance on which to base subsequent calculations.
- The properties of bound magnetopolaron with strong electron-LO phonon coupling were studied using a linear combination operator and a unitary transformation method in an asymmetry quantum dot.