Lambert N, Mahboob I, Pioro-Ladrière M, Tokura Y, Tarucha S, Yamaguchi H
Digital Materials Lab, Single Quantum Dynamics Research Group, FRS, Riken, Wako, Saitama 351-0198, Japan.
Phys Rev Lett. 2008 Apr 4;100(13):136802. doi: 10.1103/PhysRevLett.100.136802. Epub 2008 Apr 2.
We demonstrate how magnetically coupling a nanomechanical resonator to a double quantum dot confining two electrons can enable the manipulation of a single electron spin and the readout of the resonator's natural frequency. When the Larmor frequency matches the resonator frequency, the electron spin in one of the dots can be selectively and coherently flipped by the magnetized oscillator. By simultaneously measuring the charge state of the two-electron double quantum dots, this transition can be detected thus enabling the natural frequency and displacement of the mechanical oscillator to be determined.
我们展示了如何将纳米机械谐振器与限制两个电子的双量子点进行磁耦合，从而实现对单个电子自旋的操控以及谐振器固有频率的读出。当拉莫尔频率与谐振器频率匹配时，其中一个量子点中的电子自旋可被磁化振荡器选择性地、相干地翻转。通过同时测量双电子双量子点的电荷状态，可以检测到这种跃迁，从而确定机械振荡器的固有频率和位移。
