https://doi.org/10.1140/epjp/s13360-022-02338-x
Regular Article
Image adder and subtractor based on light storage
Research Center for Quantum Optics and Quantum Communication, School of Science, Qingdao University of Technology, 266033, Qingdao, China
Received:
5
September
2021
Accepted:
2
January
2022
Published online:
17
January
2022
We theoretically propose a scheme for realizing storage-based image adder and subtractor on account of the electromagnetically induced transparency (EIT). The image adder is implemented by directly storing two patterns in a four-level double-
system, while the image subtractor is achieved on the basis of the image adder and introducing a phase 
to one signal field through the cross-phase modulation. Both analytical analysis and numerical simulation clearly show that, by manipulating the splitter rate of the beam splitters and the Rabi frequencies of the coupling fields, the weighted adder and subtractor of the two patterns can be accomplished. In addition, the influence of the atomic diffusion on the image adder and subtractor is also discussed, and the scheme can be easily extended to the adder and subtractor for multiple images. The current scheme may find important applications in the realization of EIT-based devices for all-optical classical and quantum information processing of images.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
