An advanced setup for quantum ghost imaging that features asynchronous detection enables low-noise 3D imaging of distant objects. Recent experimental results show the potential of the setup to outperform classical systems in many aspects.
We present an advanced quantum ghost imaging (QGI) setup that enables low-noise, three-dimensional imaging and ranging of distant objects. A key technical innovation is asynchronous detection by independent single photon detectors, which significantly simplifies existing setups and allows imaging at arbitrary distances. Recent experimental results demonstrate low-noise imaging and efficient object ranging. An important quantum advantage with regard to secure active sensing is indistinguishability from background noise for external parties.
We present first results of a novel type of setup for quantum ghost imaging based on asynchronous single photon timing using single photon avalanche diode (SPAD) detectors. This scheme enables photon pairing with arbitrary path length difference and does, therefore, obviate the dependence on optical delay lines of current quantum ghost imaging setups [Nat. Commun.6, 5913 (2015)NCAOBW2041-172310.1038/ncomms6913]. It is also, to our knowledge, the first quantum ghost imaging setup to allow three-dimensional imaging.
We present current results of a novel, to the best of our knowledge, type of setup for quantum ghost imaging based on asynchronous single photon timing using single photon avalanche diode (SPAD) detectors, first presented in [Appl. Opt.60, F66 (2021)APOPAI0003-693510.1364/AO.423634]. The scheme enables photon pairing without fixed delays and, thus, overcomes some limitations of the widely used heralded setups for quantum ghost imaging [Nat. Commun.6, 5913 (2015)NCAOBW2041-172310.1038/ncomms6913]. It especially allows three-dimensional (3D) imaging by direct time of flight methods, the first demonstration of which will be shown here. To our knowledge, it is also the first demonstration of 3D quantum ghost imaging at all.
We investigate a novel quantum based active imaging system for remote sensing that has inherent resistance to hostile detection and jamming. It is an advanced quantum ghost imaging setup, which does not rely on preliminary information on the distances of objects. The photon source of the setup will be suited for standoff detection with illumination of remote objects in the infrared, while retrieving the spatial information in the visible regime with matured silicon technology. Due to inherent randomness of illumination patterns in space and time only the observer is able to distinguish illumination photons from ambient background noise by position- and time-correlation of entangled partner photons.