Quantum Switch for the Quantum Internet: Noiseless Communications through Noisy Channels

Understand

Counter-intuitively, quantum mechanics enables quantum particles to propagate simultaneously among multiple space-time trajectories.

• Hence, a quantum information carrier can travel through different communication channels in a quantum superposition of different orders, so that the relative time-order of the communication channels becomes indefinite.
• This is realized by utilizing a quantum device known as quantum switch.
• In this paper, we investigate, from a communication-engineering perspective, the use of the quantum switch within the quantum teleportation process, one of the key functionalities of the Quantum Internet.