Chiral SQUID-metamaterial waveguide for circuit-QED

Abstract

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.

14 pages, 6 figures

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Cited by in corpus (6)

• Consistent Quantization of Nearly Singular Superconducting Circuits
• Circuit QED with a Giant Atom Coupling to Left-handed Superlattice Metamaterials
• Harnessing spontaneous emission of correlated photon pairs from ladder-type giant atoms
• Light-Matter interactions in Hofstadter lattice with the next-nearest neighbor couplings
• Selective band interaction and long-range hopping in a structured environment with giant atoms
• Amplifying Decoherence-Free Many-Body Interactions with Giant Atoms Coupled to Parametric Waveguide