1995/02/28 by J. G. Russo, J.G. Russo, A.A. Tseytlin +1 · 2 citations
Physics and Astronomy · #Antisymmetric relation #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dilaton #Duality (order theory) #Non-critical string theory #Noncommutative and Quantum Gravity Theories #String (physics) #String cosmology #String duality #String field theory #Type I string theory #gr-qc #hep-th
paper · pdf · doi:10.1016/0550-3213(95)00245-n
published as Nucl.Phys.B449:91-145,1995 · 54 pages, harvmac (corrected and extended version)
arxiv created 1995/04/30 · openalex publication_date 1995/08/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We consider a new 3-parameter class of exact 4-dimensional solutions in closed string theory and solve the corresponding string model, determining the physical spectrum and the partition function. The background fields (4-metric, antisymmetric tensor, two Kaluza-Klein vector fields, dilaton and modulus) generically describe axially symmetric stationary rotating (electro)magnetic flux-tube type universes. Backgrounds of this class include both the dilatonic (a=1) and Kaluza-Klein (a=√ 3) Melvin solutions and the uniform magnetic field solution, as well as some singular space-times. Solvability of the string sigma model is related to its connection via duality to a simpler model which is a ``twisted" product of a flat 2-space and a space dual to 2-plane. We discuss some physical properties of this model (tachyonic instabilities in the spectrum, gyromagnetic ratios, issue of singularities, etc.). It provides one of the first examples of a consistent solvable conformal string model with explicit D=4 curved space-time interpretation.