抄録
The quantum Zeno effect (QZE) is seemingly paradoxical in a sense that an inhibition of transition or a guidance of system can be realized without loss of probability amplitudes in spite of the use of non-unitary processes. But it is quite universal and has been found in various quantum systems as well as in classical wave systems. In this report we will present two examples of QZE in the field of optics . One is theoptical pumping scheme in which atomic spin motion can be controlled without photon absorption in the fast pumping limit. The other example is the light propagation through a series of offset-spliced fibers . Two propagation modes, wave and ray, are possible in optical fibers, and QZE is found to occur only in the former mode.
