论文标题
通过超导量子电路构成的涡流式梯子中的两色驱动工程人工量规诱导的涡流 - 旋转相变
Vortex-Meissner phase transition induced by two-tone-drive-engineered artificial gauge potential in the fermionic ladder constructed by superconducting qubit circuits
论文作者
论文摘要
我们建议通过两色调驱动器定期调节现场能量，此外，该驱动器还可以用于设计人造量规的潜力。例如，我们表明，可以使用这种两色调驱动工程的人工量规电位来构建具有有效磁通量的费米子梯子模型。在这个超导系统中，由于介入偶联强度与有效磁通量之间的竞争，单粒子基态可以从涡流相到Meissner相。我们还提出了通过相邻Qubits之间的单粒子兔振荡来实验测量手性电流的方法。与以前产生人工计势的方法相反，我们的建议不需要辅助耦合器的辅助，并且原则上只有在量子电路保持足够的非谐调性的情况下才有效。具有有效磁通量的费米子梯子模型也可以解释为一维自旋轨道耦合模型，因此为实现量子自旋霍尔效应奠定了基础。
We propose to periodically modulate the onsite energy via two-tone drives, which can be furthermore used to engineer artificial gauge potential. As an example, we show that the fermionic ladder model penetrated with effective magnetic flux can be constructed by superconducting flux qubits using such two-tone-drive-engineered artificial gauge potential. In this superconducting system, the single-particle ground state can range from vortex phase to Meissner phase due to the competition between the interleg coupling strength and the effective magnetic flux. We also present the method to experimentally measure the chiral currents by the single-particle Rabi oscillations between adjacent qubits. In contrast to previous methods of generating artifical gauge potential, our proposal does not need the aid of auxiliary couplers and in principle remains valid only if the qubit circuit maintains enough anharmonicity. The fermionic ladder model with effective magnetic flux can also be interpreted as one-dimensional spin-orbit-coupled model, which thus lay a foundation towards the realization of quantum spin Hall effect.
