简介: |
Because of their great potential as the most secure communication system and their promising scalability in quantum computing, quantum information networks emerged and have been an important field in physics research in recent 15 years. Building practical quantum network calls for long coherence time and feasibly scale-up physical systems. In recent 10 years, point defects with individual controllable spins come into the focus due to their scalability, ability of interacting with photons, and long coherence times. One most promising system is the nitrogen vacancy centers in diamond. In this talk, we will start by introducing the multi-qubit quantum register composed of an electron spin and several nuclear spins around, the ways to operate them and their coherence properties. By designing photonic structures, we increase the photon collection efficiency which leads to ways of high fidelity spin readout. Emission based and absorption based quantum optical interfaces are realized based on these techniques. We will discuss how to build scalable quantum networks from these two approaches. In the end, progress in other solid state qubit systems like vacancies in SiC, rare earth ion dopant in YAG crystal will be discussed.
个人简介：杨森毕业于清华大学物理系基础科学班，在加州大学圣迭戈分校从事关于半导体量子阱里激子的量子现象的研究，于2009年获得物理博士学位。目前在德国斯图加特大学第三物理研究所从事基于固体点缺陷的量子光学的研究。
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