The decoherence of the parabolic linear bound potential quantum dot qubit
- 作者：Wang Zi-wu ; Xiao Jing-lin ; Li Wei-ping
- 关键词：Quantum dot ; Qubit ; Decoherence
- 刊名：Physica B
- 出版年：2008
- 期刊代码：53_09214526
- 类别：ph
- 出版时间：1 March 2008
- 卷：403
- 期：4
- 页码：522-525
- 文件大小：155 K
摘要
On the condition of electric–LO phonon strong coupling in parabolic quantum dot, we obtain the eigenenergies of the ground state and the first-excited state, the eigenfuctions of the ground state and the first-excited state by using variational method of Pekar type. This system in quantum dot may be employed as a two-level quantum system—qubit. The phonon spontaneous emission causes the decoherence of the qubit. The relations between the decoherence time with the coupling strength, the confinement length, the coefficient dispersion are discussed.