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Superconducting metamaterials for waveguide quantum electrodynamics

Cited 76 time in Web of Science Cited 80 time in Scopus
Authors

Mirhosseini, Mohammad; Kim, Eunjong; Ferreira, Vinicius S.; Kalaee, Mahmoud; Sipahigil, Alp; Keller, Andrew J.; Painter, Oskar

Issue Date
2018-09
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, Vol.9
Abstract
Embedding tunable quantum emitters in a photonic bandgap structure enables control of dissipative and dispersive interactions between emitters and their photonic bath. Operation in the transmission band, outside the gap, allows for studying waveguide quantum electrodynamics in the slow-light regime. Alternatively, tuning the emitter into the bandgap results in finite-range emitter-emitter interactions via bound photonic states. Here, we couple a transmon qubit to a superconducting metamaterial with a deep sub-wavelength lattice constant (lambda/60). The metamaterial is formed by periodically loading a transmission line with compact, low-loss, low-disorder lumped-element microwave resonators. Tuning the qubit frequency in the vicinity of a band-edge with a group index of n(g) = 450, we observe an anomalous Lamb shift of -28 MHz accompanied by a 24-fold enhancement in the qubit lifetime. In addition, we demonstrate selective enhancement and inhibition of spontaneous emission of different transmon transitions, which provide simultaneous access to short-lived radiatively damped and long-lived metastable qubit states.
ISSN
2041-1723
URI
https://hdl.handle.net/10371/199807
DOI
https://doi.org/10.1038/s41467-018-06142-z
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  • College of Natural Sciences
  • Department of Physics and Astronomy
Research Area Atomic, Molecular, and Optical Physics, Condensed Matter Physics, Nanoscale Physics and Photonics, 나노 물리와 나노 광자학, 원자 · 분자 및 광 물리, 응집 물질 물리

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