Physical Review Lettersin 1993, when a team from IBM published a paper about teleporting a quantum state—rather than just an object—in the journal Physical Review Letters. Five years later, physicists from the California Institute of Technology and the University of Wales in the U.K. put the theory into practice, teleporting a photon (the particle that carries light) through a meter of coaxial cabling, which is a type of transmission line commonly used to connect satellite signals or broadband internet.