Current detection of superradiance and induced entanglement of double quantum dot excitons

Details Current detection of superradiance and induced entanglement of double quantum dot excitons Current detection of superradiance and induced entanglement of double quantum dot excitons

2002-12-11

arxiv.org/abs/cond-mat/0212234v4

Phys. Rev. Lett. 90, 166802 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures, to appear in Phys. Rev. Lett. (2003)

Scientific paper

10.1103/PhysRevLett.90.166802

We propose to measure the superradiance effect by observing the current through a semiconductor double-dot ststem. An electron and a hole are injected separately into one of the quantum dots to form an exciton and then recombine radiatively. We find that the stationary current shows oscillatory behavior as one varies the inter-dot distance. The amplitude of oscillation can be increased by incorporating the system into a microcavity. Furthermore, the current is suppressed if the dot distance is small compared to the wavelength of the emitted photon. This photon trapping phenomenon generates the entangled state and may be used to control the emission of single photons at predetermined times.

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