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Entropy 2015, 17(3), 1508-1534; doi:10.3390/e17031508

Space-Time Quantum Imaging

US Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20783, USA
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Author to whom correspondence should be addressed.
Academic Editor: Hiromi Saida
Received: 1 October 2014 / Revised: 25 February 2015 / Accepted: 27 February 2015 / Published: 23 March 2015
(This article belongs to the Special Issue Entropy and Spacetime)

Abstract

We report on an experimental and theoretical investigation of quantum imaging where the images are stored in both space and time. Ghost images of remote objects are produced with either one or two beams of chaotic laser light generated by a rotating ground glass and two sensors measuring the reference field and bucket field at different space-time points. We further observe that the ghost images translate depending on the time delay between the sensor measurements. The ghost imaging experiments are performed both with and without turbulence. A discussion of the physics of the space-time imaging is presented in terms of quantum nonlocal two-photon analysis to support the experimental results. The theoretical model includes certain phase factors of the rotating ground glass. These experiments demonstrated a means to investigate the time and space aspects of ghost imaging and showed that ghost imaging contains more information per measured photon than was previously recognized where multiple ghost images are stored within the same ghost imaging data sets. This suggests new pathways to explore quantum information stored not only in multi-photon coincidence information but also in time delayed multi-photon interference. The research is applicable to making enhanced space-time quantum images and videos of moving objects where the images are stored in both space and time. View Full-Text
Keywords: quantum; space-time; ghost imaging; two-photon interference; ground glass; turbulence; turbulence-free; wavefunction; probability amplitude quantum; space-time; ghost imaging; two-photon interference; ground glass; turbulence; turbulence-free; wavefunction; probability amplitude
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Meyers, R.E.; Deacon, K.S. Space-Time Quantum Imaging. Entropy 2015, 17, 1508-1534.

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