Measurement of entanglement in coupled dots
Measurement of entanglement in coupled dots
复制标题
耦合点缠结的测量
DOI：
10.7498/aps.59.5241
复制
发表时间：
2010-08
影响因子：
1
通讯作者：
Wang Fang-Wei
中科院分区：
文献类型：
--
作者：
Wang Hai-Xia;Yin Wen;Wang Fang-Wei
利用Gurvitz提出的求解薛定谔方程的方法和数值计算，研究了耦合量子点中两个反自旋电子的振荡和纠缠，并给出了如何用量子点接触探测器读出纠缠的方法。结果显示两电子通过库伦相互作用形成量子纠缠态.强库伦作用下,它们黏在一起运动,类似于单电子在量子比特中的振荡.这种情况下,把量子点接触探测器靠近耦合双量子点,可以通过探测器的电流变化率读取电子的纠缠信息.
Using the method developed by Gurvitz of solving Schrodinger equations and the numerical calculation, we investigate the oscillation and the entanglement of the two opposite-spin electrons in coupled quantum dots, and show how to read out the entanglement by quantum point-contact detector. The results show that the two electrons start to entangle due to Coulomb interaction, and then they move together with Coulomb interaction augmenting, similar to the oscillation of an electron in a qibit. In this case, we locate a quantum point contact detector near one of the quantum dots, and the entanglement information can be obtained by changing the current.