In multi-copy state discrimination, qubit strategies beat bit strategies, but some bit-like operational theories outperform qubits even classically, revealing nonlocality without entanglement and providing general bounds.
Genera l probabilistic theories: An introduction
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Defines a resource theory of GPT-contextuality whose free operations are classical systems and univalent simulations, yielding monotones including classical excess (minimal embedding error into infinite classical systems) and parity-oblivious multiplexing success probability, with noncontextual GPTs
Applies structure theorem for quasiprobability representations to bosonic QEC codes to obtain general phase-space representations and error structures for GKP, cat, and binomial codes.
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Nonclassical traits in multi-copy state discrimination
In multi-copy state discrimination, qubit strategies beat bit strategies, but some bit-like operational theories outperform qubits even classically, revealing nonlocality without entanglement and providing general bounds.
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A Structure Theorem for Phase-Space Representations of Continuous-Variable Quantum Error-Correcting Codes
Applies structure theorem for quasiprobability representations to bosonic QEC codes to obtain general phase-space representations and error structures for GKP, cat, and binomial codes.