An All-Optical Quantum Gate in a Semiconductor Quantum Dot

@article{Li2003AnAQ,
  title={An All-Optical Quantum Gate in a Semiconductor Quantum Dot},
  author={Xiaoqin Li and Yanwen Wu and Duncan Steel and Daniel Gammon and Todd H. Stievater and D. Scott Katzer and D. Park and Carlo Piermarocchi and Lu J. Sham},
  journal={Science},
  year={2003},
  volume={301},
  pages={809 - 811}
}
We report coherent optical control of a biexciton (two electron-hole pairs), confined in a single quantum dot, that shows coherent oscillations similar to the excited-state Rabi flopping in an isolated atom. The pulse control of the biexciton dynamics, combined with previouslydemonstrated control of the single-exciton Rabi rotation, serves as the physical basis for a two-bit conditional quantum logic gate. The truth table of the gate shows the features of an all-optical quantum gate with… 
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