Nature Communications (Sep 2019)

Heisenberg-limited single-mode quantum metrology in a superconducting circuit

  • W. Wang,
  • Y. Wu,
  • Y. Ma,
  • W. Cai,
  • L. Hu,
  • X. Mu,
  • Y. Xu,
  • Zi-Jie Chen,
  • H. Wang,
  • Y. P. Song,
  • H. Yuan,
  • C.-L. Zou,
  • L.-M. Duan,
  • L. Sun

DOI
https://doi.org/10.1038/s41467-019-12290-7
Journal volume & issue
Vol. 10, no. 1
pp. 1 – 6

Abstract

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Reaching a quantum advantage in metrology usually requires hard-to-prepare two-mode entangled states such as NOON states. Here, instead, the authors demonstrate single-mode phase estimation using Fock states superpositions in a superconducting qubit-oscillator system.