Mesoscopic superposition of states with sub-Planck structures in phase space

The use cavity quantum electrodynamics method, using interaction between atoms and high-quality cavity, for realizing the superposition of coherent states was discussed. The coherent states exhibited sub-Planck structures which were direct signatures of quantum coherence and were formed by the interference between the two super-posed cat states. The results show that the central interference pattern in the Wigner function for mesoscopic superposition of cat states appears for larger values of || and disappears for smaller values. The conditional measurements helps in the study of some aspects of the mesoscopic superposition of coherent states.

Overview