Spanning-tree packing yields an optimal protocol for conference key generation from pairwise QKD links in arbitrary quantum network topologies.
The Quantum Internet (Technical Version)
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HOPPER is a novel asynchronous protocol for quantum entanglement distribution that uses hop-by-hop autonomous decisions to multiplex concurrent ebit requests, outperforming synchronous serial approaches in simulations.
Simplified error models such as Pauli twirling lead to severe discrepancies, including under/over-estimation, measurement dependencies, and fidelity oscillations, in iterative quantum network protocols.
The paper analytically derives optimal activation periods for links in linear quantum repeater chains under general fidelity constraints and extends a heuristic to general networks evaluated via simulation.
Upper bounds on distillable conference key in pair-entangled networks are derived depending on topology and entanglement, with tightness proven and optimality of pairwise distillation plus merging shown for specific cases.
The authors prove existence of a unitary that maps a two-qubit state to one where a single observable expectation equals the initial concurrence and demonstrate a robust optimal control implementation via numerical simulations.
citing papers explorer
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Spanning-tree-packing protocol for conference key propagation in quantum networks
Spanning-tree packing yields an optimal protocol for conference key generation from pairwise QKD links in arbitrary quantum network topologies.
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HOPPER: A Hop-by-hop Entanglement Distribution Protocol for Asynchronous Quantum Networks
HOPPER is a novel asynchronous protocol for quantum entanglement distribution that uses hop-by-hop autonomous decisions to multiplex concurrent ebit requests, outperforming synchronous serial approaches in simulations.
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Limitations of Error Model Approximations in Quantum Network Simulation
Simplified error models such as Pauli twirling lead to severe discrepancies, including under/over-estimation, measurement dependencies, and fidelity oscillations, in iterative quantum network protocols.
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Optimal Calibration of Quantum Network Links
The paper analytically derives optimal activation periods for links in linear quantum repeater chains under general fidelity constraints and extends a heuristic to general networks evaluated via simulation.
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Bounds on quantum conference key agreement in pair-entangled networks
Upper bounds on distillable conference key in pair-entangled networks are derived depending on topology and entanglement, with tightness proven and optimality of pairwise distillation plus merging shown for specific cases.
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Existence of a robust optimal control process for efficient measurements in a two-qubit system
The authors prove existence of a unitary that maps a two-qubit state to one where a single observable expectation equals the initial concurrence and demonstrate a robust optimal control implementation via numerical simulations.