论文标题
拓扑绝缘子约瑟夫森连接在超导量子电路中的整合
Integration of topological insulator Josephson junctions in superconducting qubit circuits
论文作者
论文摘要
超导量子电路中半导体约瑟夫森连接（JJS）的整合为混合量子台提供了一种多功能平台，并提供了一种强大的探测奇异的准粒子激发的方法。使用电路量子电动力学（CQED）来检测拓扑超导性的最新建议激发了这种回路中新型拓扑材料的整合。在这里，我们报告了使用$（BI_ {0.06} SB_ {0.94}）实现的超导式transmon Qubits _ {2} te_ {3} $ te_ {3} $ te_ {3} $ tepological Insulator（ti）JJS JJS使用Ultra-High真空制造技术。单层整合的壁挂板对我们的基材上的微波损失，用于TI纳米结构的选择性区域生长，这意味着微秒限制了放松时间，因此它们与强耦合CQED的兼容性。我们使用腔量相互作用来表明基于Ti的Transmons的Josephson能量具有其JJ尺寸，并证明了QUBIT控制以及时间量子相干性。我们的结果为新颖的约瑟夫森和拓扑Qubt的拓扑材料进行了高级研究铺平了道路。
The integration of semiconductor Josephson junctions (JJs) in superconducting quantum circuits provides a versatile platform for hybrid qubits and offers a powerful way to probe exotic quasiparticle excitations. Recent proposals for using circuit quantum electrodynamics (cQED) to detect topological superconductivity motivate the integration of novel topological materials in such circuits. Here, we report on the realization of superconducting transmon qubits implemented with $(Bi_{0.06}Sb_{0.94})_{2}Te_{3}$ topological insulator (TI) JJs using ultra-high vacuum fabrication techniques. Microwave losses on our substrates with monolithically integrated hardmask, used for selective area growth of TI nanostructures, imply microsecond limits to relaxation times and thus their compatibility with strong-coupling cQED. We use the cavity-qubit interaction to show that the Josephson energy of TI-based transmons scales with their JJ dimensions and demonstrate qubit control as well as temporal quantum coherence. Our results pave the way for advanced investigations of topological materials in both novel Josephson and topological qubits.
