Quantum Entanglement of Excitons in Coupled Quantum Dots
arXiv:cond-mat/0211151 · doi:10.1103/PhysRevA.67.012312
Abstract
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.
16 pages, 7 figures, to appear in Phys. Rev. A
References in corpus (6)
- Quantum Computation with Quantum Dots
- Josephson-Junction Qubits with Controlled Couplings
- Quantum-Information Processing with Semiconductor Macroatoms
- Entangled Bell and GHZ states of excitons in coupled quantum dots
- Exploiting exciton-exciton interactions in semiconductor quantum dots for quantum-information processing
- Quantum entanglement and information processing via excitons in optically-driven quantum dots