Two-Photon Micromaser with Initial Atomic Coherence
SUN Wei-Hui1, DU Si-De, CHEN Xiao-Shuang2
1Department of Physics, Fudan University, Shanghai 200433
2National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083
Two-Photon Micromaser with Initial Atomic Coherence
SUN Wei-Hui1;DU Si-De;CHEN Xiao-Shuang2
1Department of Physics, Fudan University, Shanghai 200433
2National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083
Abstract： We investigate the quantum dynamics of a two-photon micromaser pumped by atoms injected in the superposition state of the upper and intermediate levels. We simulate a master equation governing the system by the Monte Carlo wavefunction approach and analyse the steady-state behaviour as a function of the atomic transit time. The atomic coherence can effectively enhance the intensity and sub-Poissonian of the cavity field as compared with the atomic mixture. It is also discovered that the phase of the cavity field can be shifted by adjusting the detuning between the atom and field. This result shows that it is possible to manipulate the phase of the cavity field by detuning, due to atomic coherence.
2005, Vol. 22 
