论文标题
在腔耦合的混合量子点折扣系统中的核自旋读数
Nuclear spin readout in a cavity-coupled hybrid quantum dot-donor system
论文作者
论文摘要
核自旋显示长时间的连贯性时间，并且与环境有充分的分离，这具有使它们有望用于量子信息应用的特性。在这里，我们通过探测微波谐振器的传输来提出一种核自旋读数的方法。我们考虑通过电偶极耦合与微波谐振器相互作用的硅量子点借方设备中的一个电子，并经受均匀的磁场和横向磁场梯度。在我们的情况下，电子旋转与$^{31} \ mathrm {p} $通过超精细相互作用相互作用。从理论上讲，我们研究了P核自旋状态对通过腔体微波传递的影响，并表明核自旋读数与当前的最新设备是可行的。此外，我们确定具有强信号形成鲜明对比的最佳读数点，以促进核自旋读数的实验实现。此外，我们研究了实现核自旋量子与空腔光子之间相干激发交换的潜力。
Nuclear spins show long coherence times and are well isolated from the environment, which are properties making them promising for quantum information applications. Here, we present a method for nuclear spin readout by probing the transmission of a microwave resonator. We consider a single electron in a silicon quantum dot-donor device interacting with a microwave resonator via the electric dipole coupling and subjected to a homogeneous magnetic field and a transverse magnetic field gradient. In our scenario, the electron spin interacts with a $^{31}\mathrm{P}$ defect nuclear spin via the hyperfine interaction. We theoretically investigate the influence of the P nuclear spin state on the microwave transmission through the cavity and show that nuclear spin readout is feasible with current state-of-the-art devices. Moreover, we identify optimal readout points with strong signal contrast to facilitate the experimental implementation of nuclear spin readout. Furthermore, we investigate the potential for achieving coherent excitation exchange between a nuclear spin qubit and cavity photons.
