The viewpoint of photon diffraction can help us understand the nature of light diffraction and the evanescent waves is necessary for the uncertainty principle 光子衍射的观点可以帮助了解光的衍射本质，衰减波是不确定性原理的要求。
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Quantum key distribution is based on the heisenberg ' s uncertainty principle which guarantees that no eavesdropper can escaped detection . a linchpin technology of quantum key distribution is single photon which is foundation of security 根据量子力学中的海森伯不确定性原理及未知单光子态不可克隆原理，任何窃听者无法窃听量子密码通信中的信息而不被发现。
