!!!Please note change of time!!!

 

The Symmetry Topological Field Theory (SymTFT) is a powerful framework to encode symmetries, anomalies, and global structures of quantum field theories. In this talk I will first review its standard construction in M-theory geometric engineering on non-compact manifolds with torsion-free (co-)homologies. I will then show that in models with torsion, the corresponding SymTFTs have interfaces which prevents certain defects from ending on the physical boundary — a configuration also known as the “club sandwich” in the literature. Finally, I will use dualities to argue that such interfaces exist in SymTFTs of so-called “frozen” 7d M-theory compactifications, and of 8d IIB/F-theory models with O7+ planes.

 

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