Oscillatory behavior of a superradiating system coupled to electron reservoirs

Abstract

We investigate a superradiating system coupled to external reservoirs. Under conditions where electrons tunneling at a rate $T$ act like an electron pump, we predict a novel phenomenon in the form of oscillations with a frequency $\omega \simeq \sqrt{2\Gamma T}$ that appear in the (photon) emission intensity, where $\Gamma$ is the spontaneous decay rate of a single two-level system. The effect, together with a strong enhancement of the superradiant peak, should be observable in semiconductor quantum wells in strong magnetic fields, or in quantum dot arrays.

4 pages revtex (twocolumns), 2 figures (eps). To appear in PRL

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