CHEN Shihua, XIAO Jinglin. The Decoherence of the Unsymmetrical Parabolic Confinement Potential Quantum Dot Qubit[J]. Chinese Journal of Electronics, 2009, 18(2): 262-264.
Citation: CHEN Shihua, XIAO Jinglin. The Decoherence of the Unsymmetrical Parabolic Confinement Potential Quantum Dot Qubit[J]. Chinese Journal of Electronics, 2009, 18(2): 262-264.

The Decoherence of the Unsymmetrical Parabolic Confinement Potential Quantum Dot Qubit

  • Received Date: 2008-03-01
  • Rev Recd Date: 2008-10-01
  • Publish Date: 2009-05-25
  • On the condition of electric-LO phononstrong coupling in unsymmetrical parabolic confinementpotential Quantum dot (QD), we obtain the eigenenergiesof the ground state and the first-excited state, the eigenfuctions of the ground state and the first-excited state byusing variational method of Pekar type. This system inQD may be employed as a two-level quantum systemqubit.The phonon spontaneous emission causes the decoherenceof the qubit. The relations between decoherence time withthe coupling strength, the confinement strengths in thexy-plane and the z direction, the coeffcient dispersion arediscussed.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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