Distributed quantum sensing in a continuous-variable entangled network

Research output: Contribution to journalJournal articleResearchpeer-review


  • Xueshi Guo
  • Casper Rubæk Breum
  • Johannes Borregaard
  • Shuro Izumi
  • Mikkel V. Larsen
  • Tobias Gehring
  • Christandl, Matthias
  • Jonas Schou Neergaard-Nielsen
  • Ulrik L. Andersen
Networking is integral to quantum communications1 and has significant potential for upscaling quantum computer technologies2. Recently, it was realized that the sensing performances of multiple spatially distributed parameters may also be enhanced through the use of an entangled quantum network3,4,5,6,7,8,9,10. Here, we experimentally demonstrate how sensing of an averaged phase shift among four distributed nodes benefits from an entangled quantum network. Using a four-mode entangled continuous-variable state, we demonstrate deterministic quantum phase sensing with a precision beyond what is attainable with separable probes. The techniques behind this result can have direct applications in a number of areas ranging from molecular tracking to quantum networks of atomic clocks.
Original languageEnglish
JournalNature Physics
Number of pages8
Publication statusPublished - 23 Dec 2019

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