hep-th

Infinite matrix product states for $(1+1)$-dimensional gauge theories

This paper introduces a link-enhanced matrix product operator (LEMPO) construction that enables the study of abelian and non-abelian lattice gauge theories on infinite one-dimensional lattices by representing their Hamiltonians in a local, translation-invariant form, as demonstrated through applications to the Schwinger model and adjoint QCD$_2$.

Reduction of Complex Dynamics in Far-from-equilibrium Systems: Nambu Non-equilibrium Thermodynamics

This paper reformulates far-from-equilibrium thermodynamic systems dominated by strong nonlinearity using the Nambu bracket formalism to demonstrate their local reduction to Nambu Non-equilibrium Thermodynamics, while addressing global reduction challenges and proposing a generalized formulation involving mixed higher-order tensors.

Topological charge and black hole photon spheres in massive gravity

This paper investigates photon spheres in four-dimensional static and spherically symmetric black holes within dRGT massive gravity, revealing that while standard Einstein-like black holes possess a single unstable photon sphere, specific parameter regions allow for configurations with two or no photon spheres that exhibit distinct topological charges and stability properties compared to horizonless compact objects.

Extended applicability domain of viscous anisotropic hydrodynamics in (2+1)-D Bjorken flow with transverse expansion

This paper demonstrates that (2+1)-D viscous anisotropic hydrodynamics (VAH) outperforms traditional viscous hydrodynamics in describing the evolution of boost-invariant, conformal systems across a wide range of opacities by showing superior agreement with kinetic theory, thereby extending the applicability of hydrodynamic modeling to small systems where conventional approaches struggle.

Is string field theory background independent?

This paper critically examines the claim that string field theory is background independent, concluding that the answer depends sensitively on specific definitions of both background independence and string field theory itself, ultimately offering a mixed verdict while advocating for greater rigor in the debate.

Hyperfunctions in $A$-model Localization

This paper derives a novel exact formula for abelian observables in topologically A-twisted $\mathcal{N}=(2,2)$ supersymmetric theories on $S^2$ using localization techniques, demonstrating the equivalence between distributional integrals and complex contour integrals via hyperfunctions while confirming agreement with the Jeffrey-Kirwan residue prescription.

Dissecting the moat regime at low energies I: Renormalization and the phase structure

Covariant phase space and the semi-classical Einstein equation

This paper generalizes the covariant phase space formalism to semi-classical gravity by defining a semi-classical symplectic two-form as the sum of the gravitational symplectic form and the Berry curvature of the quantum matter state, demonstrating its slice independence and its duality to the Berry curvature in the boundary CFT within the AdS/CFT framework.

Probing decoupled Throats of AdS$_{D}$ Black Holes in $D=6,7$

This paper demonstrates that the near-extremal vanishing horizon (EVH) geometries of AdS$_{6,7}$ black holes reduce to lower-dimensional solutions conformally related to Einstein-Maxwell-Maxwell-dilaton gravity, thereby suggesting a pathway for applying higher-dimensional AdS/CFT techniques to the microscopic entropy counting of non-AdS black holes.

Quantum Spacetime: Echoes of basho

This paper argues that Nishida Kitaro's philosophical concept of *basho* offers a valuable framework for rethinking the nature of points in quantum spacetime and noncommutative geometry within the context of quantum gravity.