Counterfactual ghost imaging
Open Access
- 2 June 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in npj Quantum Information
- Vol. 7 (1), 1-7
- https://doi.org/10.1038/s41534-021-00411-4
Abstract
We give a protocol for ghost imaging in a way that is always counterfactual—while imaging an object, no light interacts with that object. This extends the idea of counterfactuality beyond communication, showing how this interesting phenomenon can be leveraged for metrology. Given, in the infinite limit, no photons ever go to the imaged object, it presents a method of imaging even the most light-sensitive of objects without damaging them. Even when not in the infinite limit, it still provides a many-fold improvement in visibility and signal-to-noise ratio over previous protocols, with over an order of magnitude reduction in absorbed intensity.Funding Information
- RCUK | Engineering and Physical Sciences Research Council (EP/M013472/1)
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