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- W4313305631 abstract "The novel weak-value-amplification (WVA) scheme of precision metrology is deeply rooted in the quantum nature of destructive interference between the pre- and post-selection states. And, an alternative version, termed as joint WVA (JWVA), which employs the difference-signal from the post-selection accepted and rejected results, has been found possible to achieve even better sensitivity (two orders of magnitude higher) under some technical limitations (e.g. misalignment errors). In this work, after erasing the quantum coherence, we analyze the difference-signal amplification (DSA) technique, which serves as a classical counterpart of the JWVA, and show that similar amplification effect can be achieved. We obtain a simple expression for the amplified signal, carry out characterization of precision, and point out the optimal working regime. We also discuss how to implement the post-selection of a classical mixed state. The proposed classical DSA technique holds similar technical advantages of the JWVA and may find interesting applications in practice." @default.
- W4313305631 created "2023-01-06" @default.
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- W4313305631 date "2022-12-28" @default.
- W4313305631 modified "2023-10-18" @default.
- W4313305631 title "Quantum-coherence-free precision metrology by means of difference-signal amplification" @default.
- W4313305631 doi "https://doi.org/10.48550/arxiv.2212.13729" @default.
- W4313305631 hasPublicationYear "2022" @default.
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