Quantum beats in the flourescence intensity of a three-level atom driven by a detuned squeezed vacuum

T. H. Cheung

Z.-C. Wang, Zhen-Qi Chen, Ying Xu

M. Bosticky

M. M. Ashraf

The emission spectra of a \ensuremath{\Lambda}-type quantum-beat three-level atomic system in a cavity is investigated. Our results suggest that the atom cannot interact with a single-mode squeezed vacuum. A variety of field inputs exhibit nonclassical effects, including the vacuum Rabi splitting and quantum beats, only for low field intensities. In the case of a coherent field input, sidebands appear whose widths are governed by the input field statistics. Off-resonant spectra exhibit transitions from predominantly spontaneous to predominantly stimulated emission.

Daniel B. Erenso, Reeta Vyas

A single two-level atom in a coherently driven cavity and damped by a broadband squeezed vacuum centered about the atomic transition frequency is studied. A second-order Fokker-Planck equation for this system is obtained without using system size expansion. Effects of detunings and cavity decays are also incorporated in the Fokker-Planck equation. This equation is used to study atomic inversion, fluorescent spectrum, and the intensity correlations of the transmitted and fluorescent photons in the bad-cavity limit. Several interesting effects in the atomic inversion, spectrum, and intensity correlations due to the squeezed vacuum are presented. These results are also compared with an atom that is damped by a thermal reservoir.

Guojian Yang, HUANG ZU-QIA, Gang Xiang Hu +1 more

Steady-state resonance fluorescence spectrum from a three-level atom driven coherently by two intense optical fields and damped by a squeezed vacuum is obtained, which shows the dependence of the spectrum strongly on the squeezing of the vacuum field and the phase difference between the squeezed component of the vacuum field and the driven fields.