Journal ArticleThe Seven Worlds and Experiences of the Wireless Metaverse: Challenges and OpportunitiesHashash, Omar; Chaccour, Christina; Saad, Walid; Yu, Tao; Sakaguchi, Kei; Debbah, MerouaneIEEE Xplore2024-06-2610517627IEEE communications magazine0163-6804https://doi.org/2210254; 2007635National Science Foundation