Topological photon pairs in a superconducting quantum metamaterial
arXiv:2006.12794 · doi:10.1103/PhysRevB.103.224520
Abstract
Recent discoveries in topological physics hold a promise for disorder-robust quantum systems and technologies. Topological states provide the crucial ingredient of such systems featuring increased robustness to disorder and imperfections. Here, we use an array of superconducting qubits to engineer a one-dimensional topologically nontrivial quantum metamaterial. By performing microwave spectroscopy of the fabricated array, we experimentally observe the spectrum of elementary excitations. We find not only the single-photon topological states but also the bands of exotic bound photon pairs arising due to the inherent anharmonicity of qubits. Furthermore, we detect the signatures of the two-photon bound edge-localized state which hints towards interaction-induced localization in our system. Our work demonstrates an experimental implementation of the topological model with attractive photon-photon interaction in a quantum metamaterial.
main text+supplementary
References in corpus (10)
- Supplementary information for "Quantum supremacy using a programmable superconducting processor"
- Topological Photonics
- Bose-Einstein Condensation in Magnetic Insulators
- Repulsively bound atom pairs in an optical lattice
- Spectral signatures of many-body localization with interacting photons
- Efficient and robust analysis of complex scattering data under noise in microwave resonators
- Progress in Superconducting Metamaterials
- Two-body physics in the Su-Schrieffer-Heeger model
- Topological two-body bound states in the interacting Haldane model
- Interaction-induced two-photon edge states in extended Hubbard model realized in a cavity array
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