摘要
运用Gurvitz提出的求解薛定谔方程的方法并结合数值计算,分析了两个自旋相反的电子在耦合双量子点中的振荡和纠缠情况,以及如何利用量子点接触读出纠缠信息.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 Schrdinger 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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第8期5241-5245,共5页
Acta Physica Sinica
基金
国家重点基础研究发展计划(批准号:2010CB33102)资助的课题~~
关键词
库伦作用
纠缠
测量
电流变化率
Coulomb interaction
entanglement
measurement
current change rate
