Abstract

Superposition states of light draw attention of those dealing with quantum optical problems because of their nonclassical properties and interesting applications [1]. One of the most extensively studied classes of superposition states are superpositions of coherent states (SCS). It is well known that squeezing, sub-Poissonian and oscillatory photon statistics in SCS are originated from quantum interference between the coherent states [1,2]. Most recently it has been shown that quantum interference has also effect on resonance fluorescence [3]. In particular, the superposition $\left|\alpha ,\varphi \right.〉=A^{I/2}\left(\left|\alpha \right.〉+\left|-\alpha \right.〉e^{i\varphi }\right)$leads to a mean atomic dipole moment instability. This instability is a result of strong atom-field entanglement arising in interactions with the nonclassical light [3].

© 1996 IEEE