论文标题
超快的连贯控制一个孔量子点中的孔自旋值
Ultrafast coherent control of a hole spin qubit in a germanium quantum dot
论文作者
论文摘要
操作速度和连贯性时间是量子量的可行性的两个核心度量。强的自旋轨道相互作用（SOI）和相对较弱的超精细相互作用在锗（GE）（GE）的有趣候选物中，用于具有快速，全电动相干控制的自旋Qubit。在这里，我们报告了在锗小屋（GHW）中的基于孔的双量子点（GHW）中的Ultrafast单旋转操纵。通过强SOI介导的磁场在100 mt的磁场上观察到超过540 MHz的RABI频率，在半导体系统中为超快自旋量子置换率控制创造了记录。我们证明了GHW中重孔（HHS）的强SOI，其特征在于非常短的自旋长度为1.5 nm，可以实现我们完成的快速门操作。我们的结果表明，超快相干控制孔旋转量子的潜力以满足Divincenzo标准对可扩展量子信息处理器的要求。
Operation speed and coherence time are two core measures for the viability of a qubit. Strong spin-orbit interaction (SOI) and relatively weak hyperfine interaction make holes in germanium (Ge) intriguing candidates for spin qubits with rapid, all-electrical coherent control. Here we report ultrafast single-spin manipulation in a hole-based double quantum dot in a germanium hut wire (GHW). Mediated by the strong SOI, a Rabi frequency exceeding 540 MHz is observed at a magnetic field of 100 mT, setting a record for ultrafast spin qubit control in semiconductor systems. We demonstrate that the strong SOI of heavy holes (HHs) in our GHW, characterized by a very short spin-orbit length of 1.5 nm, enables the rapid gate operations we accomplish. Our results demonstrate the potential of ultrafast coherent control of hole spin qubits to meet the requirement of DiVincenzo's criteria for a scalable quantum information processor.
