Work

The role of torsion in holographic conductivity

Year: 2025

Type: article

Abstract: Generalizing the usual setup for holographic duality, where bulk spacetime is described by pseudo-Riemannian geometry, we consider a Riemann-Cartan bulk with non-trivial torsion as a background for an electromagnetic gauge field dual to U (1) boundary current. Working in the probe limit, we explore how the bulk torsion, which induces spin current at the boundary, affects the electric conductivity of the boundary theory. We consider standard types of non-minimal couplings between torsion and the electromagnetic field found in the literature, and the results indicate that these torsion couplings are more suitable candidates, compared to the common minimal coupling regime, for a holographic description of the existing experimental findings regarding conductivity.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.140018

Authors: Dušan Đorđević, Ivana Đorđević, Aleksandra Gočanin, Dragoljub Gočanin

Institution: University of Belgrade

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Univerzitet u Beogradu, Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja, Science Fund of the Republic of Serbia

Awards: G1617168581, G245306513