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Robust quantum computation of the quantum kicked Harper model and dissipative decoherence

Ye Bin Xu Wen-Bo Gu Bin-Jie

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Robust quantum computation of the quantum kicked Harper model and dissipative decoherence

Ye Bin, Xu Wen-Bo, Gu Bin-Jie
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  • The effects of the dissipative decoherence on the quantum computation of the quantum kicked Harper (QKH) model are investigated using the quantum trajectory approach and the quantum Monte Carlo method. The simulation shows that the dynamical localization for the QKH model and the stochastic web in phase space are destroyed by moderate levels of dissipation. Taking the phase damping channel as the noise model, the universal law for fidelity decay and the timescales of reliable computation are analyzed. Compared with the static imperfections, the timescales for reliable computation of the dissipative system drop more quickly with the increase of the number of qubits when the decay rate is under a certain threshold. While above the threshold, the timescales drop more quickly in the presence of static imperfections.
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  • Abstract views:  8952
  • PDF Downloads:  1180
  • Cited By: 0
Publishing process
  • Received Date:  29 April 2007
  • Accepted Date:  24 May 2007
  • Published Online:  05 January 2008

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