Weak value measurement with an incoherent measuring device

Details Weak value measurement with an incoherent measuring device Weak value measurement with an incoherent measuring device

2009-11-03

arxiv.org/abs/0911.0471v2

New J. Phys. 12, 023036 (2010)

Physics

Quantum Physics

6 pages, 4 figures, corrected typo (email address)

Scientific paper

10.1088/1367-2630/12/2/023036

In the Aharonov-Albert-Vaidman (AAV) weak measurement, it is assumed that the measuring device or the pointer is in a quantum mechanical pure state. In reality, however, it is often not the case. In this paper, we generalize the AAV weak measurement scheme to include more generalized situations in which the measuring device is in a mixed state. We also report an optical implementation of the weak value measurement in which the incoherent pointer is realized with the pseudo-thermal light. The theoretical and experimental results show that the measuring device under the influence of partial decoherence could still be used for amplified detection of minute physical changes and are applicable for implementing the weak value measurement for massive particles.

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