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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All-photonic MDI-QKD protocol surpasses the single-repeater bound with key-rate scaling approaching η^{2/5} when quantum signals travel at two-thirds classical speed, using temporal multiplexing to improve rates without perfect memories.
The authors extend the converse monogamy of entanglement for tripartite pure states to broader conditions and prove maximality with respect to hierarchies of bipartite entanglement and distillability.
citing papers explorer
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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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All-photonic quantum key distribution beyond the single-repeater bound
All-photonic MDI-QKD protocol surpasses the single-repeater bound with key-rate scaling approaching η^{2/5} when quantum signals travel at two-thirds classical speed, using temporal multiplexing to improve rates without perfect memories.
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Maximal extension on converse monogamy of entanglement for tripartite pure states
The authors extend the converse monogamy of entanglement for tripartite pure states to broader conditions and prove maximality with respect to hierarchies of bipartite entanglement and distillability.