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Interferometric Phase Estimation Though Quantum Filtering in Coherent States (1601.04374v1)
Published 18 Jan 2016 in quant-ph
Abstract: We derive the form of the quantum filter equation describing the continuous observation of the phase of a quantum system in an arm of an interferometer via non-demolition measurements when the statistics of an input field used for the indirect measurement are in a general coherent state. Both quadrature homodyne detection and photon-counting dection schemes are covered, and we solve the linearized filter for a specific application.
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