Quantum Inf Process (2012) 11:995–1001 DOI 10.1007/s11128-012-0396-5 The physics of ghost imaging: nonlocal interference or local intensity ﬂuctuation correlation? Yanhua Shih Received: 26 February 2012 / Accepted: 13 March 2012 / Published online: 7 April 2012 © Springer Science+Business Media, LLC 2012 In this special Volume on Quantum Imaging, Shapiro and Boyd present a review on The Physics of Ghost Imaging. Here I argue that their Review is incomplete, as it overlooks a form of ghost imaging that requires quantum mechanical nonlocal effects for their understanding. From the very beginning, Klyshko brought attention to the nonlocal nature of biphoton interference and biphoton imaging by introducing his “advanced wave” the- ory . His “advanced wave” propagates backward in time from a photodetector to the source and then propagates forward in time from the source to another distant pho- todetector. The “advanced wave” connects the object-arm and the image-arm, as well as two independent photodetection events, in his biphoton interference and imaging model. Strekalov et al. and Pittman et al. realized nonlocal biphoton interference  and biphoton imaging  experimentally. The physics community immediately named these two experiments “ghost interference” and “ghost imaging”. Simultaneously with the experimental realization, we found that
Quantum Information Processing – Springer Journals
Published: Apr 7, 2012
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