Weak value measurement with an incoherent measuring device

Young Wook Cho, Hyang Tag Lim, Young Sik Ra, Yoon Ho Kim

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


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 is applicable for implementing the weak value measurement for massive particles.

Original languageEnglish
Article number023036
JournalNew Journal of Physics
Publication statusPublished - 2010 Feb 24

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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