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On-shell versus Off-shell Equivalence in 3D Gravity
Eric Bergshoeff, Wout Merbis, Paul Townsend
A given field theory action determines a set of field equations but other actions may yield equivalent field equations; if so they are on-shell equivalent. They may also be off-she…
An Action for Extended String Newton-Cartan Gravity
Eric Bergshoeff, Kevin Grosvenor, Ceyda Simsek +1
We construct an action for four-dimensional extended string Newton-Cartan gravity which is an extension of the string Newton-Cartan gravity that underlies nonrelativistic string th…
Nonrelativistic String Theory and T-Duality
Eric Bergshoeff, Jaume Gomis, Ziqi Yan
Nonrelativistic string theory in flat spacetime is described by a two-dimensional quantum field theory with a nonrelativistic global symmetry acting on the worldsheet fields. Nonre…
On nonrelativistic 3D Spin-1 theories
Eric A. Bergshoeff, Jan Rosseel, Paul K. Townsend
We describe non-relativistic limits of the 3D Proca and square-root Proca theories that yield spin-1 Schroedinger equations. Analogous results are found by generalized null reducti…