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.
Quantum Advantage in Communication Networks
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abstract
Quantum channels are known to provide qualitatively better information transfer capacities over their classical counterparts. Examples include quantum cryptography, quantum dense coding, and quantum teleportation. This is a short review on paradigmatic quantum communication protocols in both bipartite as well as multipartite scenarios.
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Lower bounds on localizable genuine multiparty entanglement are computed for graph states and toric codes under single-qubit Pauli noise, revealing critical noise strengths beyond which post-measurement states are biseparable.
Derives bounds on localizable entanglement versus lost entanglement for GHZ/W states, shows asymptotic equality for large Dicke states, and cubic scaling in XY/XXZ models, including under phase-flip noise.
citing papers explorer
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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.
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Localizing genuine multiparty entanglement in noisy stabilizer states
Lower bounds on localizable genuine multiparty entanglement are computed for graph states and toric codes under single-qubit Pauli noise, revealing critical noise strengths beyond which post-measurement states are biseparable.
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Controlling gain with loss: Bounds on localizable entanglement in multi-qubit systems
Derives bounds on localizable entanglement versus lost entanglement for GHZ/W states, shows asymptotic equality for large Dicke states, and cubic scaling in XY/XXZ models, including under phase-flip noise.