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Eliminating interactions between non-neighboring qubits in the preparation of cluster states in quantum molecules

Author

Listed:
  • Guo-Ping Guo
  • Xiao-Jie Hao
  • Tao Tu
  • Zhi-Cheng Zhu
  • Guang-Can Guo

Abstract

We propose a scheme to eliminate the effect of non-nearest-neighbor qubits in preparing cluster state with double-dot molecules. As the interaction Hamiltonians between qubits are Ising-model and mutually commute, we can get positive and negative effective interactions between qubits to cancel the effect of non-nearest-neighbor qubits by properly changing the electron charge states of each quantum dot molecule. The total time for the present multi-step cluster state preparation scheme is only doubled for one-dimensional qubit chain and tripled for two-dimensional qubit array comparing with the time of previous protocol leaving out the non-nearest-neighbor interactions. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Suggested Citation

  • Guo-Ping Guo & Xiao-Jie Hao & Tao Tu & Zhi-Cheng Zhu & Guang-Can Guo, 2008. "Eliminating interactions between non-neighboring qubits in the preparation of cluster states in quantum molecules," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 61(2), pages 141-146, January.
    • Handle: RePEc:spr:eurphb:v:61:y:2008:i:2:p:141-146
    DOI: 10.1140/epjb/e2008-00053-9
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