MSC2020 · 81Pxx

Foundations, quantum information and its processing, quantum axioms, and philosophy

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Counts include all statuses and descendants. Classifications are editorial or inferred from community fields, not an AMS assessment of the problem.

Subcategories

81P05General and philosophical questions in quantum theory0 81P10Logical foundations of quantum mechanics; quantum logic (quantum-theoretic aspects)0 81P13Contextuality in quantum theory0 81P15Quantum measurement theory, state operations, state preparations0 81P16Quantum state spaces, operational and probabilistic concepts0 81P17Quantum entropies0 81P18Quantum state tomography, quantum state discrimination0 81P20Stochastic mechanics (including stochastic electrodynamics)0 81P40Quantum coherence, entanglement, quantum correlations0 81P42Entanglement measures, concurrencies, separability criteria0 81P43Quantum discord0 81P45Quantum information, communication, networks (quantum-theoretic aspects)0 81P47Quantum channels, fidelity0 81P48LOCC, teleportation, dense coding, remote state operations, distillation0 81P50Quantum state estimation, approximate cloning0 81P55Special bases (entangled, mutual unbiased, etc.)0 81P65Quantum gates0 81P68Quantum computation1 81P70Quantum coding (general)0 81P73Computational stability and error-correcting codes for quantum computation and communication processing0 81P94Quantum cryptography (quantum-theoretic aspects)0 81P99Foundations, quantum information and its processing, quantum axioms, and philosophy0

Mapped problems

OP-12062Quantum informationOpen

Approximation ratio for quantum Max Cut ( $C_{50}$ )

Approximation ratio for quantum Max Cut: determine C 50 or improve its bounds; the repository records 0.614 (lower) and <1 (0.5 for product states) (upper).

Optimization Constants in Mathematics — Davis, Ivanisvili & Tao· Licensed source statement· 2026

Journals & articles in MSC 81

These are selected sources for the parent class. Article coverage is a first reviewed selection, and may not cover this exact subcategory.

Communications in Mathematical Physics ↗

Springer Nature

Mathematical physics

Journal discovery is available; article-level extraction for this class is not yet included in this batch.

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Subcategories

Mapped problems

Approximation ratio for quantum Max Cut (C50C_{50}C50​)

Journals & articles in MSC 81

Approximation ratio for quantum Max Cut ( $C_{50}$ )