2012/01/16 by Kei-ichi Maeda, Kunihito Uzawa
Physics and Astronomy · #Ansatz #Black Holes and Theoretical Physics #Brane #Brane cosmology #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Friedmann–Lemaître–Robertson–Walker metric #Geometry #Mathematical physics #Noncommutative and Quantum Gravity Theories #Physics #Quantum mechanics #Singularity #Spacetime #Supergravity #Supersymmetry #Theoretical physics #Warp drive #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.85.086004
published as Phys.Rev.D85:086004,2012 · 34 pages, 8 figures
arxiv created 2012/01/16 · openalex publication_date 2012/04/18 · arxiv updated 2012/04/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present the time-dependent solutions corresponding to the dynamical D-brane with angles in ten-dimensional type II supergravity theories. Our solutions with angles are different from the known dynamical intersecting brane solutions in supergravity theories. Because of our ansatz for fields, all warp factors in the solutions can depend on time. Applying these solutions, we construct cosmological models from those solutions by smearing some dimensions and compactifying the internal space. We find the Friedmann-Lema\\itre-Robertson-Walker cosmological solutions with power-law expansion. We also discuss the dynamics of branes based on these solutions. When the spacetime is contracting in ten dimensions, each brane approaches the others as the time evolves. However, for a Dp-brane (p\ensuremath≤7) without smearing branes, a singularity appears before branes collide. In contrast, the D6--D8-brane system or the smeared D(p\ensuremath-2)\ensuremath-Dp-brane system with one uncompactified extra dimension can provide an example of colliding branes (and collision of the universes), if they have the same charges.