Decoupling limits in String and M-theory, U-dualities and non-Lorentzian geometries

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• Niels Obers, Nordita and Niels Bohr Institute
• Thursday 02 May 2024, 13:00-14:00
• Potter Room (B1.19).

If you have a question about this talk, please contact Jackson Fliss.

I will revisit and extend near-BPS decoupling limits of type II superstring theories and M-theory. These limits generalize the well-known non-relativistic limit of a charged BPS particle. Consequently, non-Lorentzian geometries naturally occur as curved target space geometries, which I will present along with their appearance in worldsheet and worldvolume probe actions. These non-Lorentzian geometries are characterized by tangent space symmetries that follow from Inönü-Wigner contractions of the M-theory superalgebra, and include Newton-Cartan geometry and generalizations. I will discuss the duality web that unifies these decoupling limits and show how it connects different corners such as Matrix theories, non-relativistic string theory, and non-relativistic M-theory. Furthermore, I will exhibit how tensionless string theory, novel Carrollian string theories and Spin Matrix limits of AdS/CFT arise in the duality web.

This talk is part of the Quantum Fields and Strings Seminars series.

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