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Counterfactual Ghost Imaging
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Counterfactual Ghost Imaging
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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.
Forward citations
Cited by 1 Pith paper
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Interaction-free measurement of multiple objects using a universal integrated photonic processor
Experimental sequential interaction-free measurements of up to five objects with one photon on an integrated photonic processor confirm theoretical predictions after error mitigation.
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