Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • P. Y. Wen
  • K.-T. Lin
  • A. F. Kockum
  • B. Suri
  • H. Ian
  • J. C. Chen
  • S. Y. Mao
  • C. C. Chiu
  • P. Delsing
  • F. Nori
  • G.-D. Lin

Detail(s)

Original languageEnglish
Article number233602
Journal / PublicationPhysical Review Letters
Volume123
Issue number23
Online published4 Dec 2019
Publication statusPublished - 6 Dec 2019
Externally publishedYes

Abstract

Virtual photons can mediate interaction between atoms, resulting in an energy shift known as a collective Lamb shift. Observing the collective Lamb shift is challenging, since it can be obscured by radiative decay and direct atom-atom interactions. Here, we place two superconducting qubits in a transmission line terminated by a mirror, which suppresses decay. We measure a collective Lamb shift reaching 0.8% of the qubit transition frequency and twice the transition linewidth. We also show that the qubits can interact via the transmission line even if one of them does not decay into it.

Citation Format(s)

Large Collective Lamb Shift of Two Distant Superconducting Artificial Atoms. / Wen, P. Y.; Lin, K.-T.; Kockum, A. F. et al.
In: Physical Review Letters, Vol. 123, No. 23, 233602, 06.12.2019.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review