2009/11/30 by Raul E. Arias, Raúl E. Arias, Guillermo A. Silva · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Quantum Chromodynamics and Particle Interactions #hep-th
paper · pdf · doi:10.1007/jhep01(2010)023
published as JHEP 1001:023,2010 · 34 pages, 36 figures. Reference added. Final version JHEP accepted
arxiv created 2009/12/29 · openalex publication_date 2010/01/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the stability of some classical string worldsheet solutions employed for computing the potential energy between two static fundamental quarks in confining and non-confining gravity duals. We discuss the fixing of the diffeomorphism invariance of the string action, its relation with the fluctuation orientation and the interpretation of the quark mass substraction worldsheet needed for computing the potential energy in smooth (confining) gravity background. We consider various dual gravity backgrounds and show by a numerical analysis the existence of instabilities under linear fluctuations for classical string embedding solutions having positive length function derivative L'(r0)>0. Finally we make a brief discussion of 't Hooft loops in non-conformal backgrounds.