15 February 2010 Quantum Cramer-Rao bound and parity measurement
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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.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Aravind Chiruvelli, Aravind Chiruvelli, Hwang Lee, Hwang Lee, } "Quantum Cramer-Rao bound and parity measurement", Proc. SPIE 7611, Advances in Photonics of Quantum Computing, Memory, and Communication III, 76110S (15 February 2010); doi: 10.1117/12.842817; https://doi.org/10.1117/12.842817


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