Cavity-induced Population Inversion in a Driven Two-Level Atom

Abebe Yeshaw, Misrak Getahun

Gao‐xiang Li, PENG JIN-SHENG, Wu Shao-Ping +1 more

A cavity-modified master equation is derived for a coherently driven V-type three-level atom coupled to a single-mode cavity in the bad cavity limit. The influences of the cavity-induced quantum interference on the steady-state populations are analysed. We show that the population inversion can occur due to the effect of cavity-induced quantum interference. PACS: 42. 50. Dv, 42. 50. Gy

Dongmei Liu

We investigate the bare-state populations for a coherently driven two two-level atoms coupled to a single-mode cavity in the bad cavity limit.By adjusting the detuning of the cavity-mode frequency from the driving filed frequency to the generalized Rabi frequency,we can find the phenomenon of the bare-state population inversion.

Rheinischen Friedrich-Wilhelms-UniversitBonn

Markus Lindberg, Craig M. Savage

A two-level atom illuminated by a laser may be driven into a population-inverted steady state if it is coupled to a cavity. This is a result of the quantum nature of the electromagnetic field and is forbidden by the semiclassical theory. We numerically and analytically analyze this inversion. We find the maximum possible inversion and determine the rate of approach to the steady state. The quantized cavity modifies the electromagnetic vacuum seen by the atom; this connects our work to that on cavity-enhanced spontaneous emission and on dynamical line narrowing. Experimental signatures of the inversion and potential experimental difficulties are considered. For example, neither the presence of many atoms in the mode nor many modes in the cavity destroys the inversion.

Daniel B. Erenso, Reeta Vyas, Surendra Singh