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
Publisher AMERICAN PHYSICAL SOC
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)
Formalism
States
Optics
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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