Quantum Entanglement of Excitons in Coupled Quantum Dots

Details Quantum Entanglement of Excitons in Coupled Quantum Dots Quantum Entanglement of Excitons in Coupled Quantum Dots

2002-11-08

arxiv.org/abs/cond-mat/0211151v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, 7 figures, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.67.012312

Optically-controlled exciton dynamics in coupled quantum dots is studied. We show that the maximally entangled Bell states and Greenberger-Horne-Zeilinger (GHZ) states can be robustly generated by manipulating the system parameters to be at the avoided crossings in the eigenenergy spectrum. The analysis of population transfer is systematically carried out using a dressed-state picture. In addition to the quantum dot configuration that have been discussed by Quiroga and Johnson [Phys. Rev. Lett. \QTR{bf}{83}, 2270 (1999)], we show that the GHZ states also may be produced in a ray of three quantum dots with a shorter generation time.

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