k-designs achieve maximal discriminability for pure states in multi-copy minimum-error discrimination; mixed states outperform for larger ensembles, with quantum offering quadratic advantage over classical.
Quantum cryptography: Public key distribution and coin tossing
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An SDP-based framework computes optimal quantum cloning maps via Choi isomorphism, certifies optimality with duality, and extracts Kraus operators for universal, phase-covariant, asymmetric, and entanglement cloning including higher-order cases.
Performance modeling of BB84, B92, BBM92, and E91 protocols over LEO satellite QKD links finds downlink configurations yield lower QBER and higher secure key rates than uplinks under day and night conditions.
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The most discriminable quantum states in the multicopy regime
k-designs achieve maximal discriminability for pure states in multi-copy minimum-error discrimination; mixed states outperform for larger ensembles, with quantum offering quadratic advantage over classical.
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Semidefinite Programming for Optimal Quantum Cloning: A Computational Framework
An SDP-based framework computes optimal quantum cloning maps via Choi isomorphism, certifies optimality with duality, and extracts Kraus operators for universal, phase-covariant, asymmetric, and entanglement cloning including higher-order cases.
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Performance Analysis of Satellite-Based QKD Protocols
Performance modeling of BB84, B92, BBM92, and E91 protocols over LEO satellite QKD links finds downlink configurations yield lower QBER and higher secure key rates than uplinks under day and night conditions.