论文标题
在半导体 - 纳米线的transmon Qubits中的主要振荡和平等交叉口
Majorana oscillations and parity crossings in semiconductor-nanowire-based transmon qubits
论文作者
论文摘要
我们表明，在半导体 - 纳米线的transmon Qubits中的微波炉（MW）光谱为连接中主要结合状态的存在提供了强烈的签名。这是因为外部磁场将电线调为拓扑状态，而新兴Majorana模式的能量分裂则在有限长的电线中的波函数空间重叠，因此左右振荡。特别是，我们讨论了这些主要的振荡以及伴随的费米亚奇偶校验在结基底状态下如何产生独特的光谱特征 - 在吸收线的互段可见性的形式中，这些特征与标准的跨月度行为强烈偏离。相反，非振荡的零模式，例如由于足够光滑的电势而产生的拓扑琐碎的Andreev结合状态，表现出总体标准的Transmon响应。 MW响应中的这些差异可以帮助确定该交界处是否包含拓扑主体。
We show that the microwave (MW) spectra in semiconductor-nanowire-based transmon qubits provide a strong signature of the presence of Majorana bound states in the junction. This occurs as an external magnetic field tunes the wire into the topological regime and the energy splitting of the emergent Majorana modes oscillates around zero energy owing to their wave function spatial overlap in finite-length wires. In particular, we discuss how these Majorana oscillations, and the concomitant fermion parity switches in the ground state of the junction, result in distinct spectroscopic features --in the form of an intermitent visibility of absorption lines-- that strongly deviate from standard transmon behavior. In contrast, non-oscillating zero modes, such as topologically trivial Andreev bound states resulting from sufficiently smooth potentials, exhibit an overall standard transmon response. These differences in the MW response could help determine whether the junction contains topological Majoranas or not.
