Optimal Quantum Measurements for Phase Estimation

Sanders, BC and Milburn, GJ (1995) Optimal Quantum Measurements for Phase Estimation. Physical Review Letters, 75 16: 2944-2947. doi:10.1103/PhysRevLett.75.2944

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Author Sanders, BC
Milburn, GJ
Title Optimal Quantum Measurements for Phase Estimation
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
Publication date 1995-10-01
Year available 1995
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.75.2944
Open Access Status File (Publisher version)
Volume 75
Issue 16
Start page 2944
End page 2947
Total pages 4
Place of publication COLLEGE PK
Language eng
Abstract Quantum information theory is applied to practical interferometer-based phase measurements to deduce the optimal phase measurement scheme with two optical modes. Optimal phase measurements, given ideal input states, reveal an asymptotic 1/n decrease in phase uncertainty Delta theta for n the mean photon number of the input state. In contradistinction to previous schemes for realizing the number-phase uncertainty limit, the 1/n limit achieved here is independent of the interferometer phase shift; prior information about the expected phase shift is not necessary to attain this limit. These results apply more generally to su(2) and so(3) phase parameter estimation.
Keyword Su(2)
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
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Citation counts: TR Web of Science Citation Count  Cited 151 times in Thomson Reuters Web of Science Article | Citations
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