We study the field entropy squeezing as a measure of the entanglement in a three-level system interacting with a cavity field. Numerical calculations under current experimental conditions are performed and it is found that the initial state setting and atom-field coupling present changes of the general features of the field entropy squeezing dramatically Read more

Entropy squeezing is examined in the framework of Shannon information entropy for a degenerate Raman process involving two degenerate Rydberg energy levels of an atom interacting with a single-mode cavity field. Quantum squeezing in entropy is exhibited via the entropic uncertainty relation. Read more

Adopting the framework of single electrons or Cooper pairs where the rate of particle transfer is controlled by an external frequency, we investigate the dynamics of the coupled system, considering the single-mode cavity field prepared in a generalized geometric state. Considering a density matrix approach, we obtain a full description of the dynamics of the coupled system for a weak ... Read more

We investigate the entropy squeezing and entanglement of the Cooper-pair box interacting with multi-photon cavity field. The field is prepared initially in the coherent state, while the Cooper-pair box is assumed to start from a mixed state. We find that the number of photons and the detuning parameters play an important role in the entropy squeezing and entanglement. We observe ... Read more