图示法解读旋光仪实验的尝试

以"用旋光仪测糖溶液的浓度"实验为例,展示了用图示法解读仪器结构和测量原理的教学案例.     

例说微积分在大学物理中的应用

通过曹冲称象的故事阐述了微积分在物理学中的应用,并说明了矢量的微积分计算中的两点细节.     

Scheme for splitting quantum information via W states in cavity QED systems

Assisted by multipartite entanglement, Quantum information may be split so that the original qubit can be reconstructed if and only if the recipients cooperate. This paper proposes an experimentally feasible scheme for splitting quantum information via W-type entangled states in cavity QED systems, where three-level Rydberg atoms interact with nonresonant cavities. Since W-type states are used as the quantum channel and the cavities are only virtually excited, the scheme is easy to implement and robust against decoherence, and the dependence on the quality factor of the cavities is greatly reduced.     

螺旋测微器的一般读数方法

根据螺旋测微器的测量原理和结构特点,指出一般情况下正确读数的两个关键点,并举例说明.     

“绳连接”问题的运动学公式

对于绳连接物体的问题,根据运动学基本公式推导了各物体的速度和加速度满足的公式,并举例说明其应用.