# When Entanglement meets Classical Communications: Quantum Teleportation for the Quantum Internet (Invited Paper). (arXiv:1907.06197v1 [quant-ph])

Quantum Teleportation is the key communication functionality of the Quantum
Internet, allowing the transmission'' of qubits without either the physical
transfer of the particle storing the qubit or the violation of the quantum
mechanical principles. Quantum teleportation is facilitated by the action of
quantum entanglement, a somewhat counter-intuitive physical phenomenon with no
direct counterpart in the classical word. As a consequence, the very concept of
the classical communication system model has to be redesigned to account for
the peculiarities of quantum teleportation. This re-design is a crucial
prerequisite for constructing any effective quantum communication protocol. The
aim of this manuscript is to shed light on this key concept, with the objective
of allowing the reader: i) to appreciate the fundamental differences between
the transmission of classical information versus the teleportation of quantum
information; ii) to understand the communications functionalities underlying
quantum teleportation, and to grasp the challenges in the design and practical
employment of these functionalities; iii) to acknowledge that quantum
information is subject to the deleterious effects of a noise process termed as
quantum decoherence. This impairment has no direct counterpart in the classical
world; iv) to recognize how to contribute to the design and employment of the
Quantum Internet.