- 
                            
                            
                                                            
                            
                                                                    81Q05                                                            
                            Closed and approximate solutions to the Schrödinger, Dirac, Klein-Gordon and other equations of quantum mechanics
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q10                                                            
                            Selfadjoint operator theory in quantum theory, including spectral analysis
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q12                                                            
                            Non-selfadjoint operator theory in quantum theory
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q15                                                            
                            Perturbation theories for operators and differential equations
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q20                                                            
                            Semiclassical techniques, including WKB and Maslov methods
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q30                                                            
                            Feynman integrals and graphs; applications of algebraic topology and algebraic geometry [See also  
14D05,  
32S40]
 
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q35                                                            
                            Quantum mechanics on special spaces: manifolds, fractals, graphs, etc.
                         
                                                - 
                            
                                                            
                            
                                                            
                            
                                                                    81Q37                                                            
                            Quantum dots, waveguides, ratchets, etc.
                         
                                                - 
                            
                                                            
                            
                                                            
                            
                                                                    81Q40                                                            
                            Bethe-Salpeter and other integral equations
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q50                                                            
                            Quantum chaos [See also  
37Dxx]
 
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q60                                                            
                            Supersymmetry and quantum mechanics
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q65                                                            
                            Alternative quantum mechanics
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q70                                                            
                            Differential-geometric methods, including holonomy, Berry and Hannay phases, etc.
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q80                                                            
                            Special quantum systems, such as solvable systems
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q93                                                            
                            Quantum control
                         
                                                - 
                            
                            
                                                            
                            
                                                                    81Q99                                                            
                            None of the above, but in this section