Quantum stretching protocol to share states among three nonlocal qubits

Mastriani, Mario

doi:10.1007/s11082-023-05223-8

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2023

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“…Of all the quantum communications protocols developed to date, quantum teleportation and super-dense coding 17 are the first and most important. Countless efforts have been made during the last two decades to extend the applicability of these protocols to: transmit multiple qubits at the same time 18 , 19 , transmit the qubits in both directions 20 – 26 , and simplify its physical implementation 27 – 31 . …”

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confidence: 99%

Simplified entanglement swapping protocol for the quantum Internet

Mastriani

2023

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In this study, a simplified version of the entanglement-swapping protocol, commonly used in the deployment of quantum networks, is presented. Quantum repeaters are essential in extending the range of quantum networks, especially when they are implemented through the laying of optical fiber. The simplified version of the entanglement-swapping protocol does not require the use of unitary transforms to finish characterizing the shared Bell state at both ends to be connected, as happens in the traditional version of the protocol, facilitating and reducing costs in quantum repeater implementations. Both a theoretical demonstration and an experimental one on an optical table, based on two revealing experiments, show the excellent performance of the presented protocol.

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