Scalable Quantum Key Distribution via GHZ Entanglement and Qubit Reuse

Name: Scalable Quantum Key Distribution via GHZ Entanglement and Qubit Reuse
Uploaded: 2026-10-05T18:39:56.107856+00:00
Duration: 313 s
Description: The method proposes reusing a single GHZ qubit across multiple key bits in Quantum Key Distribution (QKD) to overcome bandwidth limitations. By using an $(L+1)$-qubit state and Quantum Non-Demolition (QND) measurements, one can transmit $L$ classical bits using only one transmitted qubit, achieving an efficiency of $\eta = L$. This significantly scales quantum networks.

The method proposes reusing a single GHZ qubit across multiple key bits in Quantum Key Distribution (QKD) to overcome bandwidth limitations. By using an $(L+1)$-qubit state and Quantum Non-Demolition (QND) measurements, one can transmit $L$ classical bits using only one transmitted qubit, achieving an efficiency of $\eta = L$. This significantly scales quantum networks.

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