Information encoding in the spatial correlations of entangled twin beams

Gaurav Nirala, Siva T. Pradyumna, Ashok Kumar, Alberto M. Marino

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The ability to use the temporal and spatial degrees of freedom of quantum states of light to encode and transmit information is crucial for a robust and efficient quantum network. In particular, the potential offered by the large dimensionality of the spatial degree of freedom remains unfulfilled, as the necessary level of control required to encode information remains elusive. We encode information in the distribution of the spatial correlations of entangled twin beams by taking advantage of their dependence on the angular spectrum of the pump needed for four-wave mixing. We show that the encoded information can only be extracted through joint spatial measurements of the twin beams and not through individual beam measurements and that the temporal quantum correlations are not modified. The ability to engineer the spatial properties of twin beams will enable high-capacity quantum networks and quantum-enhanced spatially resolved sensing and imaging.

Original languageEnglish
Article numbereadf9161
JournalScience Advances
Volume9
Issue number22
DOIs
StatePublished - Jun 2023

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