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Proceedings Paper

Quantum Cramer-Rao bound and parity measurement
Author(s): Aravind Chiruvelli; Hwang Lee
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Paper Abstract

We show, by using parity detection, that the phase estimate obtained from the linear error propagation formula, indeed saturates the lower bound set by maximizing quantum Fisher information for several of the well-known states, proposed for the Heisenberg limited interferometry. Our results show that one can achieve the quantum Cram´er-Rao bound, by simply counting the number of photons which is not very far from actual realization.

Paper Details

Date Published: 15 February 2010
PDF: 6 pages
Proc. SPIE 7611, Advances in Photonics of Quantum Computing, Memory, and Communication III, 76110S (15 February 2010); doi: 10.1117/12.842817
Show Author Affiliations
Aravind Chiruvelli, Louisiana State Univ. (United States)
Hwang Lee, Louisiana State Univ. (United States)


Published in SPIE Proceedings Vol. 7611:
Advances in Photonics of Quantum Computing, Memory, and Communication III
Zameer U. Hasan; Alan E. Craig; Philip R. Hemmer; Charles M. Santori, Editor(s)

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