Journal
PHYSICAL REVIEW A
Volume 88, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.88.042109
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Funding
- Royal Society
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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.
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