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Abstract
It is well known,by Erwin Schrödinger, Hisenberg and the Dirac et al established the quantum mechani-cs ,which is foundation of modern physics.This article introduce the macroscopic quantum effect and study new experimental progress, and analyze the macroscopic quantum effect condition the basic characteristics. The article explained the quantum tunneling (realization of macroscopic quantum coherent) and the quantum state phase interference. For example the macroscopic quantum effect the superconductor as the example, theory has proven that the reason is the non-linear function, because of the symmetry spontaneous broken, after has spontaneous coherent condition and accurate bose state of condensation which changes forms. Finally we briefly introduce the difference between macroscopic quantum effect and microscopic quantum effect..
Keywords£ºSuperconductor Broken Coherence Bose condensation Macroscopic quantum effect Quantum tunneling