Waveguide quantum electrodynamics with superconducting artificial giant atoms

Bharath Kannan (), Max J. Ruckriegel, Daniel L. Campbell, Anton Frisk Kockum, Jochen Braumüller, David K. Kim, Morten Kjaergaard, Philip Krantz, Alexander Melville, Bethany M. Niedzielski, Antti Vepsäläinen, Roni Winik, Jonilyn L. Yoder, Franco Nori, Terry P. Orlando, Simon Gustavsson and William D. Oliver ()
Additional contact information
Bharath Kannan: Massachusetts Institute of Technology
Max J. Ruckriegel: Massachusetts Institute of Technology
Daniel L. Campbell: Massachusetts Institute of Technology
Anton Frisk Kockum: Chalmers University of Technology
Jochen Braumüller: Massachusetts Institute of Technology
David K. Kim: MIT Lincoln Laboratory
Morten Kjaergaard: Massachusetts Institute of Technology
Philip Krantz: Massachusetts Institute of Technology
Alexander Melville: MIT Lincoln Laboratory
Bethany M. Niedzielski: MIT Lincoln Laboratory
Antti Vepsäläinen: Massachusetts Institute of Technology
Roni Winik: Massachusetts Institute of Technology
Jonilyn L. Yoder: MIT Lincoln Laboratory
Franco Nori: RIKEN Cluster for Pioneering Research
Terry P. Orlando: Massachusetts Institute of Technology
Simon Gustavsson: Massachusetts Institute of Technology
William D. Oliver: Massachusetts Institute of Technology

Nature, 2020, vol. 583, issue 7818, 775-779

Abstract: Abstract Models of light–matter interactions in quantum electrodynamics typically invoke the dipole approximation1,2, in which atoms are treated as point-like objects when compared to the wavelength of the electromagnetic modes with which they interact. However, when the ratio between the size of the atom and the mode wavelength is increased, the dipole approximation no longer holds and the atom is referred to as a ‘giant atom’2,3. So far, experimental studies with solid-state devices in the giant-atom regime have been limited to superconducting qubits that couple to short-wavelength surface acoustic waves4–10, probing the properties of the atom at only a single frequency. Here we use an alternative architecture that realizes a giant atom by coupling small atoms to a waveguide at multiple, but well separated, discrete locations. This system enables tunable atom–waveguide couplings with large on–off ratios3 and a coupling spectrum that can be engineered by the design of the device. We also demonstrate decoherence-free interactions between multiple giant atoms that are mediated by the quasi-continuous spectrum of modes in the waveguide—an effect that is not achievable using small atoms11. These features allow qubits in this architecture to switch between protected and emissive configurations in situ while retaining qubit–qubit interactions, opening up possibilities for high-fidelity quantum simulations and non-classical itinerant photon generation12,13.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/s41586-020-2529-9 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:583:y:2020:i:7818:d:10.1038_s41586-020-2529-9

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/s41586-020-2529-9

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().