Post-selected weak measurement beyond the weak value

Details Post-selected weak measurement beyond the weak value Post-selected weak measurement beyond the weak value

2009-09-11

arxiv.org/abs/0909.2206v4

Physical Review A 81, 044102 (2010)

Physics

Quantum Physics

The published version; with respect to previous one, note changes in Eqs. (16),(17),(19).

Scientific paper

10.1103/PhysRevA.81.044102

Closed expressions are derived for the quantum measurement statistics of pre-and postselected gaussian particle beams. The weakness of the pre-selection step is shown to compete with the non-orthogonality of post-selection in a transparent way. The approach is shown to be useful in analyzing post-selection-based signal amplification, allowing measurements to be extended far beyond the range of validity of the well-known Aharonov-Albert-Vaidman limit.

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