Quantum Cramér-Rao Bounds for Waveform Estimation with Open Systems [PDF]
Mankei TsangThis paper studies quantum limits to waveform estimation in the presence of decoherence. A modified purification approach is used to obtain tighter quantum Cram\'er-Rao bounds that can account for information lost to the environment. Two examples, namely, optomechanical force sensing and lossy optical phase estimation, are studied.View original: http://arxiv.org/abs/1301.5733
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