(Phys.org) Quantum communication takes advantage of the laws of quantum physics to protect data. These laws allow particles—typically photons of light —to transmit the data using quantum bits, or qubits. Professor Stefano Pirandola, from the University of York’s Department of Computer Science have been studying the optimal working mechanism of a future quantum Internet, and also provided the ultimate secret-key capacities that can potentially be achieved. He said: “Studying quantum networks is notoriously difficult, but recent mathematical tools developed in quantum information theory have allowed us to completely simplify the analysis.”
Pirandola’s study reveals that the classical-inspired strategy of simultaneously sending qubits through multiple routes of the network can remarkably boost the rate, i.e., the speed of the quantum communication between any two remote users.

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