Optical control protocols for high-fidelity spin rotations of single SiV− and SnV− centers in diamond
Optical control protocols for high-fidelity spin rotations of single SiV− and SnV− centers in diamond
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DOI：
10.1103/physrevb.104.115302
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发表时间：
2021-05
影响因子：
3.7
通讯作者：
E. Takou;S. Economou
中科院分区：
文献类型：
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作者：
E. Takou;S. Economou
金刚石中的硅空位缺陷和锡空位缺陷由于其上级光学性质而作为NV中心的替代量子位而受到关注。虽然这些缺陷中的光学跃迁的可用性是其资产之一，但高保真光学相干控制尚未得到证明。在这里，我们设计新的光学控制方案，针对这些缺陷。考虑到相干和非相干误差，我们评估了电子自旋量子比特在不存在和存在外部磁场的情况下的任意单量子比特旋转的性能。我们发现，在存在真实的弛豫和泄漏误差的情况下，Si-V和Sn-V分别可以实现超过98.0%（T = 4 K）和99.71%（T = 6 K）的旋转。
Silicon-vacancy and tin-vacancy defects in diamond are of interest as alternative qubits to the NV center due to their superior optical properties. While the availability of optical transitions in these defects is one of their assets, high-fidelity optical coherent control has not been demonstrated. Here, we design novel optical control schemes tailored to these defects. We evaluate the performance of arbitrary single-qubit rotations of the electron spin qubit both in the absence and presence of an external magnetic field, by taking into account both coherent and incoherent errors. We find that rotations in excess of 98.0% (T = 4 K) and 99.71% (T = 6 K) can be achieved for Si-V and Sn-V respectively in the presence of realistic relaxation and leakage errors.