Multidimensional Entanglement Generation with Multicore Optical Fibers
Esteban S. Gómez, Santiago A. Gomez, I. Machuca, Adán Cabello, Sebastião Pádua, Stephen Patrick Walborn, Gislayne Karen dos Santos Lima · Physical Review Applied · 2021
Quantum communication will undoubtedly be deployed in telecommunication networks of the future. The current development in classical communication is motivated by the rapidly approaching limit of existing optical fibers, known as the ``capacity crunch''. A promising solution is $s\phantom{\rule{0}{0ex}}p\phantom{\rule{0}{0ex}}a\phantom{\rule{0}{0ex}}c\phantom{\rule{0}{0ex}}e\ensuremath{-}d\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}v\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}s\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}n$ $m\phantom{\rule{0}{0ex}}u\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}p\phantom{\rule{0}{0ex}}l\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}x\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}g$, in which using the spatial modes supported in modern optical fibers increases their information capacity. The authors exploit related technologies to provide a source of entangled photons compatible with this latest trend in classical communication, which may serve as a standard for the next generation of entanglement-based quantum communication systems.