Quantum Teleportation (量子テレポーテーション Ryoushi Terepōtēshon) is the instantaneous transference of properties of quantum information, physical information moved to the state of a quantum system, from one system to another without physical contact. The application of this term in Digimon Tamers refers to the interchangeability between realized and metaphorized states in the Digital World and Real World respectively.
Quantum teleportation plays a very crucial role throughout the duration of Digimon Tamers, particularly during the emergence of the D-Reaper in Shinjuku, when Zero-Arms: Grani was transported there to aid Dukemon from being completed in the Digital World's plane. In Digimon Tamers - Episode 47, Shibumi explains this in detail (under construction)
Other References in Digimon Tamers
Alice, as well as the name of her grandfather, Rob - a pet name similar to Bob are one of two commonly used placeholders for archetypal characters in quantum teleportation.