Quantum states for Heisenberg-limited interferometry

H. Uys, P. Meystre

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


The phase sensitivity of interferometers is limited by the so-called Heisenberg limit, which states that the optimum phase sensitivity is inversely proportional to the number of interfering particles N, a 1 N improvement over the standard quantum limit. We have used simulated annealing, a global optimization strategy, to systematically search for quantum interferometer input states that approach the Heisenberg-limited uncertainty in estimates of the interferometer phase shift. We compare the performance of these states to that of other nonclassical states already known to yield Heisenberg-limited uncertainty.

Original languageEnglish (US)
Article number013804
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
StatePublished - Jul 9 2007
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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