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Can non-relativistic strings propagate without geometric baggage? A minimal Hamiltonian formulation in Newton-Cartan geometry
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Can non-relativistic strings propagate without geometric baggage? A minimal Hamiltonian formulation in Newton-Cartan geometry
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Journal Article
Can non-relativistic strings propagate without geometric baggage? A minimal Hamiltonian formulation in Newton-Cartan geometry
2025
Overview
A
bstract
We present a minimal and dynamically consistent formulation of non-relativistic bosonic string theory in a Newton-Cartan background. Starting from a reparametrization-invariant Nambu-Goto action, we develop the Hamiltonian framework and perform a complete Dirac constraint analysis. The resulting structure exhibits first-class constraints that generate worldsheet diffeomorphisms, confirming the internal gauge consistency of the model. Using an interpolating Lagrangian, we derive a Polyakov-type action that enables a direct comparison with symmetry-based constructions known as gauging-the-algebra (GTA) approaches, which promote non-relativistic symmetry algebras to local symmetries. In contrast to GTA formulations which require additional background fields to achieve algebraic closure — our model derives all necessary geometric data dynamically from the string evolution itself. This establishes that standard geometry is sufficient to support consistent non-relativistic string dynamics. Our results provide a conceptually transparent and technically robust foundation for future studies of non-relativistic string theory in curved backgrounds.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,SpringerOpen
