| 81-XX |
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Quantum theory |
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81Qxx |
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General mathematical topics and methods in quantum theory |
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81Q05 |
Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other quantum-mechanical equations |
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81Q10 |
Selfadjoint operator theory in quantum theory, including spectral analysis |
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81Q15 |
Perturbation theories for operators and differential equations |
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81Q20 |
Semiclassical techniques including WKB and Maslov methods |
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81Q30 |
Feynman integrals and graphs; applications of algebraic topology and algebraic geometry [See also 14D05, 32S40] |
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81Q40 |
Bethe-Salpeter and other integral equations |
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81Q50 |
Quantum chaos [See also 37Dxx] |
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81Q60 |
Supersymmetric quantum mechanics |
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81Q70 |
Differential-geometric methods, including holonomy, Berry and Hannay phases, etc. |
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81Q99 |
None of the above, but in this section |
