Based on quantum mechanical two base experiments,electrical two-slit interference experiment and Stern-Gerlach experiment, two new concepts of quantum communication theory,quantum decoherence and quantum entanglement are derived, and the new activity was given to the base experiments.

The history of a century of the discovery of the electron is reviewed,the proceeding of the experiment of quasiparticles fractional charges in condensed matter physic and the improvement of two-slit electron interference experiment are introduced.

In this paper we improve the biprism interference experiment by using a semiconductor laser instead of Na light as a light source.

Theoretical analysis of light distance difference in double-slit interference;

Discuss of Talbot Effect Basing on Young′s Double-slit Interference;

Influence of light-source-size on light intensity distribution of double-slit interference;

In the interference experiments using soft X-ray laser for diagnosed high temperature and high dense plasmas,it is urgently necessary to have some semitransparent multilayer beam splitters with definite reflectivity and transmission as well as high quality surface figure.