We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Waveguide bandgap engineering with an array of superconducting qubits.
- Authors
Brehm, Jan David; Poddubny, Alexander N.; Stehli, Alexander; Wolz, Tim; Rotzinger, Hannes; Ustinov, Alexey V.
- Abstract
Waveguide quantum electrodynamics offers a wide range of possibilities to effectively engineer interactions between artificial atoms via a one-dimensional open waveguide. While these interactions have been experimentally studied in the few qubit limit, the collective properties of such systems for larger arrays of qubits in a metamaterial configuration has so far not been addressed. Here, we experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control coupled to the mode continuum of a waveguide. By consecutively tuning the qubits to a common resonance frequency we observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. Making use of the qubits quantum nonlinearity, we demonstrate control over the latter by inducing a transparency window in the bandgap region of the ensemble. The circuit of this work extends experiments with one and two qubits toward a full-blown quantum metamaterial, thus paving the way for large-scale applications in superconducting waveguide quantum electrodynamics.
- Subjects
BAND gaps; WAVEGUIDES; QUBITS; QUANTUM electrodynamics; METAMATERIALS; ELECTRODYNAMICS
- Publication
NPJ Quantum Materials, 2021, Vol 6, Issue 1, p1
- ISSN
2397-4648
- Publication type
Article
- DOI
10.1038/s41535-021-00310-z