Schrödinger cats and their power for quantum information processing

A. Gilchrist*, Kae Nemoto, W. J. Munro, T. C. Ralph, S. Glancy, Samuel L. Braunstein, G. J. Milburn

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

113 Citations (Scopus)


We outline a toolbox comprised of passive optical elements, single photon detection and superpositions of coherent states (Schrödinger cat states). Such a toolbox is a powerful collection of primitives for quantum information processing tasks. We illustrate its use by outlining a proposal for universal quantum computation. We utilize this toolbox for quantum metrology applications, for instance weak force measurements and precise phase estimation. We show in both these cases that a sensitivity at the Heisenberg limit is achievable.

Original languageEnglish
Pages (from-to)S828-S833
Number of pages6
JournalJournal of Optics B: Quantum and Semiclassical Optics
Issue number8
Publication statusPublished - Aug 2004
Externally publishedYes


  • High precision measurements
  • Quantum information processing
  • Quantum metrology
  • Quantum toolbox
  • Schrödinger cats


Dive into the research topics of 'Schrödinger cats and their power for quantum information processing'. Together they form a unique fingerprint.

Cite this