Iterative phase estimation

C. J. O'Loan

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We give an iterative algorithm for phase estimation of a parameter., which is within a logarithmic factor of the Heisenberg limit. Unlike other methods, we do not need any entanglement or an extra rotation gate which can perform arbitrary rotations with almost perfect accuracy: only a single copy of the unitary channel and basic measurements are needed. Simulations show that the algorithm is successful. We also look at iterative phase estimation when depolarizing noise is present. It is seen that the algorithm is still successful provided the number of iterative stages is below a certain threshold.

Original languageEnglish
Number of pages15
JournalJournal of Physics A: Mathematical and Theoretical
Volume43
Issue number1
DOIs
Publication statusPublished - 8 Jan 2010

Keywords

  • QUANTUM
  • ENTANGLEMENT
  • GEOMETRY
  • CHANNELS

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