Quantum Manipulation of Spins in Semiconductors

半导体自旋电子学的目标是为未来的（量子）信息处理开发功能器件。我们将解决的基本方面，这是很重要的性能的新器件的概念，特别是在半导体纳米结构的自旋纠缠电子的创建和检测。在上一个资助期，我们已经表明，任何现实的检测方案必须仔细设计，使用高阶相关函数可能是必要的，一个明确的检测纠缠。在未来的资助期内，我们将继续探索探测器动力学和反作用对半导体、量子通道和量子点中自旋纠缠电子传输的影响。我们将进一步发展我们设计的一般方案，用高阶自旋或电流量子化器来检测量子关联。这将不仅是有用的传输设置，但也为最近开发的自旋噪声光谱技术。它将能够检测量子相干性，退相和自旋之间的相互作用。

Semiconductor spintronics has the aim to develop functional devices for future (quantum-) information processing. We will address fundamental aspects, which are important for the performance of novel device concepts, especially for the creation and detection of spinentangled electrons in semiconductor nanostructures. In the previous funding period, we have shown that any realistic detection scheme has to be carefully designed and that the use of higher-order correlation functions might be necessary for an unambiguous detection of entanglement. In the coming funding period we will continue to explore the effect of detector dynamics and back action on the transport of spin-entangled electrons in semiconductors, quantum channels and quantum dots. We will develop further the general scheme we have devised to detect quantum correlations using higher-order spin or current correlators. This will not only be useful in transport setups, but also for the recently developed spin-noise spectroscopy technique. It will enable the detection of quantum coherence, dephasing, and interaction between spins.