81R12 Relations with integrable systems [See also <a href="#code:17Bxx">17Bxx</a>, <a href="#code:37J35">37J35</a>]

81R15 Operator algebra methods [See also <a href="#code:46Lxx">46Lxx</a>, <a href="#code:81T05">81T05</a>]

81R25 Spinor and twistor methods [See also <a href="#code:32L25">32L25</a>]

81R30 Coherent states [See also <a href="#code:22E45">22E45</a>]; squeezed states [See also <a href="#code:81V80">81V80</a>]

81R50 Quantum groups and related algebraic methods [See also <a href="#code:16T20">16T20</a>, <a href="#code:17B37">17B37</a>]

81R99 None of the above, but in this section

81Sxx General quantum mechanics and problems of quantization

81S05 Canonical quantization, commutation relations and statistics

81S10 Geometry and quantization, symplectic methods [See also <a href="#code:53D50">53D50</a>]

81S22 Open systems, reduced dynamics, master equations, decoherence [See also <a href="#code:82C31">82C31</a>]

81S30 Phase-space methods including Wigner distributions, etc.

81S40 Path integrals [See also <a href="#code:58D30">58D30</a>]

81S99 None of the above, but in this section

81Txx Quantum field theory; related classical field theories [See also <a href="#code:70Sxx">70Sxx</a>]

81T05 Axiomatic quantum field theory; operator algebras

81T13 Yang-Mills and other gauge theories [See also <a href="#code:53C07">53C07</a>, <a href="#code:58E15">58E15</a>]

81T15 Perturbative methods of renormalization

81T16 Nonperturbative methods of renormalization

81T20 Quantum field theory on curved space backgrounds

81T28 Thermal quantum field theory [See also <a href="#code:82B30">82B30</a>]

81T30 String and superstring theories; other extended objects (e.g., branes) [See also <a href="#code:83E30">83E30</a>]

81T40 Two-dimensional field theories, conformal field theories, etc.

81T45 Topological field theories [See also <a href="#code:57R56">57R56</a>, <a href="#code:58Dxx">58Dxx</a>]

81T70 Quantization in field theory; cohomological methods [See also <a href="#code:58D29">58D29</a>]

81T75 Noncommutative geometry methods [See also <a href="#code:46L85">46L85</a>, <a href="#code:46L87">46L87</a>, <a href="#code:58B34">58B34</a>]