Quantum metrology with entangled coherent states

2011/01/31 by Jaewoo Joo, William J. Munro, Timothy P. Spiller · 3 citations
Physics and Astronomy · #quant-ph

paper · pdf · doi:10.1103/physrevlett.107.083601

published as Phys. Rev. Lett. 107, 083601 (2011) · 5 pages, 3 figures

arxiv created 2011/11/29 · arxiv updated 2011/11/30

Abstract

We present an improved phase estimation scheme employing entangled coherent states and demon- strate that the states give the smallest variance in the phase parameter in comparison to NOON, BAT and "optimal" states under perfect and lossy conditions. As these advantages emerge for very modest particle numbers, the optical version of entangled coherent state metrology is achievable with current technology.

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