Then the phase coherent states are defined.

In this paper,interacting of two level atom with phase coherent states is studied by use of the Jayness-Cummings model transition probability between every two levels of atom with phase coherent states for radiation field interacting is also studied.

The results show that the phase coherence among the impurity atoms within magnetic particle plays a key role for the origin of maximum GMR.

In order to keep phase coherence between the transmitter and the receiver,we implemented a method in which the frequencies of the transmitter and the receiver were switched simultaneously during pulse sequence execution,and reset to their original values,respectively,at the end of sequence.

The time-evolution of entanglement in the interacting System of the atom and coherence field with phase decoherence;

The time evolution of the collapses and revivals of the atomic inversion and the photon number distribution in a system where a two-level atom interacts with the field that is prepared in the coherent state and discussed the influence of the phase decoherence on nonclassical effects are studied.

The Pulse-to-pulse phase coherence of a super-continuum comb, which is generated by sending a mode-locked femtosecond laser pulse through a segment of photonic crystal fiber (PCF), is a pre-requisite when this super-continuum comb is used for optical frequency measurement.