Cavity quantum electrodynamics with atom-like mirrors
Abstract
It has long been recognized that atomic emission of radiation is not an immutable property of an atom, but is instead dependent on the electromagnetic environment and, in the case of ensembles, also on the collective interactions between the atoms. In an open radiative environment, the hallmark of collective interactions is enhanced spontaneous emission—super-radiance—with non-dissipative dynamics largely obscured by rapid atomic decay. Here we observe the dynamical exchange of excitations between a single artificial atom and an entangled collective state of an atomic array through the precise positioning of artificial atoms realized as superconducting qubits along a one-dimensional waveguide. This collective state is dark, trapping radiation and creating a cavity-like system with artificial atoms acting as resonant mirrors in the otherwise open waveguide. The emergent atom–cavity system is shown to have a large interaction-to-dissipation ratio (cooperativity exceeding 100), reaching the regime of strong coupling, in which coherent interactions dominate dissipative and decoherence effects. Achieving strong coupling with interacting qubits in an open waveguide provides a means of synthesizing multi-photon dark states with high efficiency and paves the way for exploiting correlated dissipation and decoherence-free subspaces of quantum emitter arrays at the many-body level.
Additional Information
© 2019 Springer Nature Publishing AG. Received 29 September 2018; Accepted 07 March 2019; Published 15 May 2019. We thank J.-H. Yeh and B. Palmer for the use of one of their cryogenic attenuators, which reduced thermal noise in the input waveguide line. This work was supported by the AFOSR MURI Quantum Photonic Matter (grant FA9550-16-1-0323), the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (grant PHY-1125565) with the support of the Gordon and Betty Moore Foundation, and the Kavli Nanoscience Institute at Caltech. D.E.C. acknowledges support from the ERC Starting Grant FOQAL, the MINECO Plan Nacional Grant CANS, the MINECO Severo Ochoa grant SEV-2015-0522, the CERCA Programme/Generalitat de Catalunya and the Fundacio Privada Cellex. M.M. is supported through a KNI Postdoctoral Fellowship. X.Z. is supported by a Yariv/Blauvelt Fellowship. A.J.K. and A.S. are supported by IQIM Postdoctoral Scholarships. P.B.D. is supported by a Hertz Graduate Fellowship Award. A.A.-G. is supported by the Global Marie Curie Fellowship under the LANTERN programme. Author Contributions: M.M., E.K., P.B.D., A.A.-G., D.E.C. and O.P. came up with the concept and planned the experiment. M.M., E.K., X.Z., P.B.D., A.S. and A.J.K. performed the device design and fabrication. E.K., X.Z., M.M., and A.S. performed the measurements and analysed the data. All authors contributed to the writing of the manuscript. The authors declare no competing interests.Attached Files
Supplemental Material - 41586_2019_1196_Fig5_ESM.jpg
Supplemental Material - 41586_2019_1196_Fig6_ESM.jpg
Supplemental Material - 41586_2019_1196_MOESM1_ESM.pdf
Supplemental Material - 41586_2019_1196_Tab1_ESM.jpg
Files
Additional details
- Alternative title
- Cavity QED with atom-like mirrors
- Alternative title
- Waveguide-mediated interaction of artificial atoms in the strong coupling regime
- Eprint ID
- 93217
- Resolver ID
- CaltechAUTHORS:20190225-095611254
- Air Force Office of Scientific Research (AFOSR)
- FA9550-16-1-0323
- Institute for Quantum Information and Matter (IQIM)
- NSF
- PHY-1125565
- Gordon and Betty Moore Foundation
- Kavli Nanoscience Institute
- European Research Council (ERC)
- FOQAL
- Ministerio de EconomÃa, Industria y Competitividad (MINECO)
- SEV-2015-0522
- CERCA Programme
- Generalitat de Catalunya
- Fundacio Privada Cellex
- Fannie and John Hertz Foundation
- Marie Curie Fellowship
- LANTERN
- Created
-
2019-05-15Created from EPrint's datestamp field
- Updated
-
2023-02-08Created from EPrint's last_modified field
- Caltech groups
- Institute for Quantum Information and Matter, Kavli Nanoscience Institute