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Showing 1 to 1 of 1 for “"Orientifold conformal field theories"”.
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Symmetry-protected topological phases and quantum anomalies
… of the global U(1) gauge anomalies on its edge theories defined on closed unorientable manifolds. In this case, the nontrivial phase (in free systems) is robust against electron interactions. Another example is the (3+1)d topological superconductor protected by only time-reversal or reflection …