Physics – Quantum Physics
Scientific paper
2003-07-14
Phys. Rev. A 68, 053808 (2003)
Physics
Quantum Physics
Scientific paper
10.1103/PhysRevA.68.053808
The preparation of mesoscopic states of the radiation and matter fields through atom-field interactions has been achieved in recent years and employed for a range of striking applications in quantum optics. Here we present a technique for the preparation and control of a cavity mode which, besides interacting with a two-level atom, is simultaneously submitted to linear and parametric amplification processes. The role of the amplification-controlling fields in the achievement of real mesoscopic states, is to produce highly-squeezed field states and, consequently, to increase both: i) the distance in phase space between the components of the prepared superpositions and ii) the mean photon number of such superpositions. When submitting the squeezed superposition states to the action of similarly squeezed reservoirs, we demonstrate that under specific conditions the decoherence time of the states becomes independent of both the distance in phase space between their components and their mean photon number. An explanation is presented to support this remarkable result, together with a discussion on the experimental implementation of our proposal. We also show how to produce number states with fidelities higher than those derived as circular states.
de Paula F. R.
Moussa M. H. Y.
Serra Roberto M.
Villas-Boas Celso J.
No associations
LandOfFree
Preparation and control of a cavity-field state through atom-driven field interaction: towards long-lived mesoscopic states does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Preparation and control of a cavity-field state through atom-driven field interaction: towards long-lived mesoscopic states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation and control of a cavity-field state through atom-driven field interaction: towards long-lived mesoscopic states will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-382129