Journal
PHYSICAL REVIEW A
Volume 85, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.85.012113
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Funding
- JSPS
- Grants-in-Aid for Scientific Research [10J02592] Funding Source: KAKEN
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Some exact formulas of the expectation values and probability densities in a weak measurement for an operator A that satisfies the property A(2) = 1 are derived. These formulas include all-order effects of the unitary evolution due to the von Neumann interaction. These are valid not only in the weak-measurement regime, but also in the strong-measurement regime and tell us the connection between these two regimes. Using these formulas, arguments of the optimization of the signal amplification and the signal-to-noise ratio are developed in two typical experimental setups.
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