ERA NanoSci - Optical interface for gate-controlled quantum dots

量子信息可以有不同的形式，其中光子偏振最适用于远距离通信，而单电子自旋最适用于量子比特相互作用。然而，单电子自旋和单光子极化之间的量子界面尚未被证明。在这个项目中，我们建议将产生单光子的光活性量子点与控制单电子自旋的门控量子点相结合。在我们的方案中，电子自旋量子点由电子门控制，两种量子点之间的耦合也将由纳米级门控制。我们的最终目标是将两个具有不同功能的量子点相干地连接在一起：一个光学活跃的量子点和一个网关定义的量子点，通过动态控制局部电位将单个电子转换为单个光子。

Quantum information can take different forms, among which photon polarization is most useful for long distance communication while single electron spin is most useful for qubits interactions. However, no quantum interface between a single-electron spin and a single-photon polarization has yet been demonstrated. In this project we suggest to interface optically active quantum dots generating single photons with gate-controlled quantum dots controlling single electron spins. In our scheme, the electron spin quantum dots are controlled by electrical gates and the coupling between the two types of quantum dots will also be controlled by nanometer scale gates. Our ultimate aim is to coherently interface two quantum dots with different functionalities: an optically active quantum dot with a gatedefined quantum dot via a dynamic control of the local potential to convert single electrons into single photons.