论文标题
部分可观测时空混沌系统的无模型预测
Chiral SQUID-metamaterial waveguide for circuit-QED
论文作者
论文摘要
由结构化基本电路元件设计和制造的超导材料的超导材料激发了探索电路量子电动力学中非常规量子现象的最新发展。我们提出了一种方法，通过考虑针对其有效阻抗进行编程的时空调制，以1D约瑟夫森的超材料为手性波导。调制电流的形式是相位速度比微波光子的传播速度慢得多。由于布里鲁因分裂过程，光子可以在单向上传播的非平凡光谱方案。考虑到超导码头与这种超材料波导耦合，我们分析了马尔可夫和非马克维亚量子动力学，发现超导码头可以单向消散光子。此外，我们表明我们的建议可以扩展一个带有多个节点的级联量子网络，可以在其中实现远程量子器之间的手性光子传输。我们的工作可能为利用鱿鱼材料的可能性开放，以实现电路QED平台中的单向光子传输。
Superconducting metamaterials, which are designed and fabricated with structured fundamental circuit elements, have motivated recent developments of exploring unconventional quantum phenomena in circuit quantum electrodynamics (circuit-QED). We propose a method to engineer 1D Josephson metamaterial as a chiral waveguide by considering a programmed spatiotemporal modulation on its effective impedance. The modulation currents are in the form of traveling waves which phase velocities are much slower than the propagation speed of microwave photons. Due to the Brillouin-scattering process, non-trivial spectrum regimes where photons can propagate unidirectionally emerge. Considering superconducting qubits coupling with this metamaterial waveguide, we analyze both Markovian and non-Markovian quantum dynamics, and find that superconducting qubits can dissipate photons unidirectionally. Moreover, we show that our proposal can be extended a cascaded quantum network with multiple nodes, where chiral photon transport between remote qubits can be realized. Our work might open the possibilities to exploit SQUID metamaterials for realizing unidirectional photon transport in circuit-QED platforms.
