Quantum theory of atomic coherence effects

Xiaoguang Zhou

The nonlinear theory of interaction between q-deformed light field and a cascade three-level atom is established.And the formal solution of Schrdinger equation in the representation is obtained.Then,the influence of q-deformed on photon squeezing effects is studied through numerical calculation.The results show that more q deviates from 1 the stronger the controllability to squeezing effects.It reflects that q-deformed nonlinear action has influence on the quantum coherence and quantum properties.When q→1,the theory reduces to the common linear theory.The analyse with q-deformed even coherent light field reflects that q-deformed odd coherent light field not only don't have squeezing effects,but also weaken it.This conclusion is same with that q-deformed even coherent light field and q-deformed odd coherent light field have different quantum properties.

Miguel Orszag

Zhang Hui-hui

The nonlinear theory of interaction between q-deformed odd coherent light field and a cascade three-level atom is established.And the formal solution of Schrdinger equation in the representation and its average number are obtained.Then,the influence of q-deformed on photon antibunching effects is studied through numerical calculation.The results show that the q-deformed has much ability of control to the photon antibunching effects.It reflects that q-deformed nonlinear action has influence on the quantum coherence and quantum properties.When q→1,the theory reduces to the common linear theory.

J. H. Macek

The theory of atomic lifetime measurements is developed on the basis of the quantum theory of radiation. The effect of coherent emission on the shape of the decay curves is studied in detail. It is shown that the light intensity will oscillate in time when two closely spaced levels decay coherently. Oscillations due to interference between fine-structure levels of the hydrogen atom in particular are discussed.

Miguel Orszag