Observation of the Effect of Frequency Correlations on a Cascade Transition

Helen K. Holt

Helen K. Holt

Fu Li, Hang Zheng, Shi‐Yao Zhu

The quantum correlation in dephasing decay can be realized, when the energy fluctuations of transition frequencies are synchronized. The correlation in the three-level atom systems will enhance the interference in the absorption and change the nature of the interference, from destructive to constructive in cascade low-driving three-level atom and from constructive to destructive in V-type three-level atom. The quantum correlation is observed by properly introducing the collision or time-dependent magnetic field through the increase or decrease of the resonant absorption.

Shaik Liyakhath Ahmed, Preethi N. Wasnik, Suneel Pratap Singh +1 more

A Al-Hilfy, R. Loudon

Expressions are derived for the intensity correlations or degrees of second-order coherence within and between two light beams of different frequency generated by cascade emission from a three-level atom. The atoms are assumed to be excited by two monochromatic coherent light beams in resonance with the upper and lower pairs of levels that constitute the triplet. The two emitted beams individually show photon antibunching and the correlation between the beams shows another complementary kind of non-classical effect. It is suggested that measurements on the system described here would provide more detailed information on quantum effects in cascade emission than previous observations with direct excitation to the uppermost atomic level by electron bombardment.

Valentina V. Lebedeva, R. I. Sokolovskiǐ, K. L. Pando