Local NOT operations convert entanglement sudden death to asymptotic decay for genuine multipartite concurrence in small multipartite systems under amplitude damping, while teleportation fidelity preservation requires flipping all qubits in some cases and allows use of biseparable states in GHZ CQT.
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A protocol is presented that grows large entangled multi-qubit states, including generalized GHZ states, from smaller entangled pairs via graph-basis-assisted measurements that truncate Hilbert space and concentrate entanglement.
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Decoherence Mitigation with Local NOT Gates in Multipartite Systems
Local NOT operations convert entanglement sudden death to asymptotic decay for genuine multipartite concurrence in small multipartite systems under amplitude damping, while teleportation fidelity preservation requires flipping all qubits in some cases and allows use of biseparable states in GHZ CQT.
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Scalable and deterministic Greenberger-Horne-Zeilinger state generation via graph states-assisted measurements
A protocol is presented that grows large entangled multi-qubit states, including generalized GHZ states, from smaller entangled pairs via graph-basis-assisted measurements that truncate Hilbert space and concentrate entanglement.