Interaction-free ghost-imaging of structured objects

Ghost Imaging of Space Objects

The Physics of Turbulence-Free Ghost Imaging

Since its first experimental demonstration, ghost imaging has attracted a great deal of attention due to interests in its fundamental nature and its potential applications. In terms of applications, the most interesting and useful feature, perhaps, is the turbulence insensitivity of thermal light ghost imaging, i.e., atmospheric turbulence would not have any influence on the ghost images of sun...

Ghost-Free High Dynamic Range Imaging

Most high dynamic range image (HDRI) algorithms assume stationary scene for registering multiple images which are taken under different exposure settings. In practice, however, there can be some global or local movements between images caused by either camera or object motions. This situation usually causes ghost artifacts which make the same object appear multiple times in the resultant HDRI. ...

Interaction-free measurements of quantum objects

We show that it is possible in principle to realize a unit-efficiency initial state preserving interaction-free measurements (IFM) of quantum objects characterized by their superpositions. Some generalized work is also discussed. c 2001 Optical Society of America OCIS codes: (000.1600) Classical and quantum physics; (270.0270) Quantum optics The concept of Interaction free measurement (IFM) was...

Ghost-free Braneworld Bigravity

We consider a generalisation of the DGP model, by adding a second brane with localised curvature, and allowing for a bulk cosmological constant and brane tensions. We study radion and graviton fluctuations in detail, enabling us to check for ghosts and tachyons. By tuning our parameters accordingly, we find bigravity models that are free from ghosts and tachyons. These models will lead to large...