论文标题
自旋 - 韦尔量子单元：理论建议
Spin-Weyl quantum unit: theoretical proposal
论文作者
论文摘要
我们提出了一个四州量子系统或量子单元，可以在超导杂项结构中实现。该单元结合了旋转状态和一个Andreev Qubit，提供了其州量子叠加的机会。该功能是通过在4末端超导体杂壳壳和量子点之间的隧道耦合来实现的。 Weyl点附近的量子状态对超导相的小变化极为敏感，这为量子操作提供了机会。 我们为设置建立了有效的哈密顿量，并描述了所得频谱的特殊性。我们专注于四州子空间，并说明如何在此设置中进行双倍量子。 我们回顾了在单元中实现量子操作的各种方法，其中包括共振，绝热，绝热操作和这些组合。我们提供了单元中设计任意量子门的详细说明。
We propose a four-state quantum system, or quantum unit, that can be realized in superconducting hetero-structures. The unit combines the states of a spin and an Andreev qubit providing the opportunity of quantum superpositions of their states. This functionality is achieved by tunnel coupling between a 4-terminal superconducting heterostucture housing a Weyl point, and a quantum dot. The quantum states in the vicinity of the Weyl point are extremely sensitive to small changes of superconducting phase, this gives reach opportunities for quantum manipulation. We establish an effective Hamiltonian for the setup and describe the peculiarities of the resulting spectrum. We concentrate on the 4-state subspace and explain how to make a double qubit in this setup. We review various ways to achieve quantum manipulation in the unit, this includes resonant, adiabatic, diabatic manipulation and combinations of those. We provide detailed illustrations of designing arbitrary quantum gates in the unit.
