Abstract

We report on an experimental demonstration of quantum imaging where the images are stored in both space and time. Quantum images of remote objects are produced with rotating ground glass induced chaotic laser light and two sensors measuring at different space-time points. Quantum images are observed to move depending on the time delay between the sensor measurements. The experiments provide a new testbed for exploring the time and space scale fundamental physics of quantum imaging and suggest new pathways for quantum information storage and processing. The moved quantum images are in fact new images that are stored in a space-time virtual memory process. The images are stored within the same quantum imaging data sets and thus quantum imaging can produce more information per photon measured than was previously realized.

Highlights

  • The space-time ghost imaging experiments consisted of using the reference field images at each time tref = ti and a bucket field measured at a separate time tb = ti+∆i where ti is the time of the ith measurement

  • Space-time ghost imaging was performed in non-turbulent conditions where the heating elements in Figure 2 were turned off

  • In conclusion we have demonstrated interesting features of space-time quantum imaging where the

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Summary

Introduction

Meyers et al [1,2] in 2007 and 2008 pioneered the first ghost image of a remote object by imaging a small toy soldier in their setup at the U.S Army Research Laboratory.This demonstration was the first practical application of ghost imaging and it showed that ghost imaging could be applied to remote sensing from astrophysical to microscopic scales with the potential of increased resolution, increased contrast, and mitigation of adverse effects from distorting media.Other interesting Ghost imaging research includes experiments on entangled photon ghost imaging through laboratory turbulence [3], signal-to-noise studies and illumination variations [4,5], studies on contrast and visibility [6,7], virtual or computational ghost imaging [8,9,10], along with associated fundamental experimental [11] and theoretical physics [12,13,14]. Meyers et al [1,2] in 2007 and 2008 pioneered the first ghost image of a remote object by imaging a small toy soldier in their setup at the U.S Army Research Laboratory. This demonstration was the first practical application of ghost imaging and it showed that ghost imaging could be applied to remote sensing from astrophysical to microscopic scales with the potential of increased resolution, increased contrast, and mitigation of adverse effects from distorting media. In particular we asked the question, “Can ghost images be generated when the two sensors of ghost imaging make photon measurements at different times?” In this paper we present our experimental findings demonstrating that new types of space-time ghost images can be generated when the measurements of the two-photon system are separated in time as well as space

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