JIANG Wenying, ZHAO Zhimin, LIU Yujie, et al. Spatial Decoherence Induced by Spontaneous Emission[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2014,53(4):52-55.
JIANG Wenying, ZHAO Zhimin, LIU Yujie, et al. Spatial Decoherence Induced by Spontaneous Emission[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2014,53(4):52-55.DOI:
The decoherence dynamics of a two-level atom coupled into a vacuum electromagnetic field are studied. The analytic solution of the Schrodinger equation has been given
and then the reduced density matrix for the motion of the atomic center of mass has been derived. It is shown that spontaneous emission induces the entanglement between the atomic spatial motion and the atomic electronic states
which induces the spatial quantum decoherence of the atom. The decoherence factor is given
and its properties
such as dynamical evolution with time and evolution for different atomic positions
are demonstrated by some figures.
关键词
量子退相干真空自发辐射质心运动二能级原子
Keywords
quantum decoherencespontaneous emissionmotion of the center of masstwo-level atom