Superpositions of squeezed states and their interaction with two-level atoms

G. M. Abd Al-Kader, M. M. A. Ahamd

H. M. Moya-Cessa, A. Vidiella-Barranco

We investigate some of the fundamental features of the interaction of squeezed light with two-level atoms in the framework of the Jaynes-Cummings model. We start our analysis by calculating the collapses and revivals of the atomic inversion. We discuss the degree of purity of the field (given by the entropy) and its disentanglement from the atomic source. The connection with the evolution of the Q-function is also made. We notice that contrary to the coherent state case, the field turns into a nearly pure (squeezed) state at the revival time as if the field was prepared in a coherent state. The field also becomes a superposition of squeezed states at half of the revival time, and this is confirmed by investigating the photon number distribution. The phase properties of the field are discussed using the Pegg-Barnett formalism.

Celso J. Villas-Bôas, F R de Paula, R M Serra +1 more

We present a proposal for the production of longer-lived mesoscopic superpositions which relies on two requirements: parametric amplification and a squeezed vacuum reservoir for cavity-field states. Our proposal involves the interaction of a two-level atom with a cavity field which is simultaneously subjected to amplification processes.

A.‐S. F. Obada, Zeinab M. Omar

Eyob Alebachew, K. Fesseha

M. Arif