| Description |
A recent application of the principle of complementarity has led to a unique imaging technique in which the photon interacting with an object is not detected to obtain the image [1,2]. We will discuss the associated theory and then show how it leads to a new research direction in the field of quantum information science, where the measurement of correlation between two or more particles is of crucial importance. In particular, a method of measuring the correlation between the momenta of two photons will be presented [3,4] in which only one of the photons is detected.This method can be extended to verify the entanglement of a two-photon mixed state. The method enables us to consider wavelengths for which good detectors are not available, thereby extending the experimental reach further.
[1] GB Lemos, et al. Nature 512, 409 (2014).
[2] M Lahiri, R Lapkiewicz, GB Lemos and A Zeilinger, Phys. Rev. A 92, 013832 (2015).
[3] M Lahiri, A Hochrainer, R Lapkiewicz, GB Lemos and A Zeilinger, Phys. Rev. A 96, 013822 (2017).
[4] A Hochrainer, M Lahiri, R Lapkiewicz, GB Lemos and A Zeilinger, Proc. Natl. Acad. Sci.(USA) 114, 1508 (2017).
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