Correlated Coherent Oscillations in Coupled Semiconductor Charge Qubits

Gou Shinkai, Toshiaki Hayashi, Takeshi Ota, and Toshimasa Fujisawa
Phys. Rev. Lett. 103, 056802 – Published 28 July 2009


We study coherent dynamics of two spatially separated electrons in a coupled semiconductor double quantum dot (DQD). Coherent oscillations in one DQD are strongly influenced by electronic states of the other DQD, or the two electrons simultaneously tunnel in a correlated manner. The observed coherent oscillations are interpreted as various two-qubit operations. The results encourage searching quantum entanglement in electronic devices.

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  • Received 17 January 2009


©2009 American Physical Society

Authors & Affiliations

Gou Shinkai1,2, Toshiaki Hayashi1, Takeshi Ota1, and Toshimasa Fujisawa1,2

  • 1NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, 243-0198, Japan
  • 2Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan

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Vol. 103, Iss. 5 — 31 July 2009

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