We give a simple intuition for why and when entanglement is needed for quantum-enhanced precision measurements, and which type of entanglement is useful. We give a simple construction that shows how entanglement transforms parallel estimation strategies into sequential ones of the same precision. We employ this argument to provide some useful results and to rederive in a simpler form some known results.
Intuitive reason for the usefulness of entanglement in quantum metrology
MACCONE, LORENZO
2013-01-01
Abstract
We give a simple intuition for why and when entanglement is needed for quantum-enhanced precision measurements, and which type of entanglement is useful. We give a simple construction that shows how entanglement transforms parallel estimation strategies into sequential ones of the same precision. We employ this argument to provide some useful results and to rederive in a simpler form some known results.File in questo prodotto:
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