Literature review: 4 September 2026

113
Active entries
10
Areas
40
Sharp questions
28
Improved
0
Solved
Full catalogue review. All 111 original entries reassessed; 12 questions added or promoted. Merged entries and background pages remain accessible but are excluded from active counts. What changed →

Each problem carries a horizon badge indicating what would count as progress:

Sharp — A proof or single counterexample closes it.Incremental — Progress = a better bound or larger tractable class.Programme — A research field; not closable by one submission.Conceptual — No community-agreed success criterion (yet).

Evidence matters: “Improved” records partial progress, which may include a preprint claim; it does not mean the problem is solved or the proof independently verified. Author-reported AI use is recorded separately from mathematical status. No disclosure does not mean no AI use.

11 active entries · M series

Mathematical QM & spectral theory

Rigorous spectral theory of Schrödinger operators: binding, localization, gaps, quantum chaos.

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15 active entries · B series

Quantum many-body theory

Area laws, tensor networks, thermalization, phases, Bose condensation, Laughlin and kagome benchmarks.

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10 active entries · QF series

Mathematical quantum field theory

Gauge-theory construction, mass gaps, scattering, continuum entanglement and local measurements.

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14 active entries · E series

Entanglement theory

Distillability, LOCC, entanglement measures, marginals, the entropy cone, AME states.

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10 active entries · N series

Nonlocality & measurement geometry

SICs and MUBs, Bell correlations and locality thresholds, self-testing and contextuality.

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12 active entries · C series

Quantum channels & Shannon theory

Capacities, strong converses, Gaussian and memory channels, computability of capacities.

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18 active entries · A series

Quantum algorithms & complexity

BQP separations, QMA, quantum PCP, state testing, fault tolerance and classical verification.

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4 active entries · U series

Computability & undecidability

Where the spectral-gap, phase, thermalization and capacity problems become undecidable.

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10 active entries · O series

Open systems & quantum thermodynamics

Lindblad generators, dynamics learning, memory, thermal operations and Gibbs preparation.

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9 active entries · F series

Quantum foundations & operational frameworks

Measurement, reconstruction, subsystem structure, causal order and quantum reference frames.

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Corrections and additions are welcome.