338 citations · 3.5k across the 44 of their papers we have counts for
44 papers
Instantons: the next frontier
Gaia Comaschi, Marcos Jardim, Cristian Martinez +1
Instantons, emerged in particle physics, have been intensely studied since the 1970's and had an enormous impact in mathematics since then. In this paper, we focus on one particula…
Static spacetimes haunted by a phantom scalar field: classification and global structure in the massless case
Cristian Martinez, Masato Nozawa
We discuss various novel features of -dimensional spacetimes sourced by a massless (non-)phantom scalar field in general relativity. Assuming that the metric is a warped…
Junction conditions in scalar-tensor theories
Luis Avilés, Hideki Maeda, Cristian Martinez
We analyze junction conditions at a null or non-null hypersurface in a large class of scalar-tensor theories in arbitrary dimensions. After showing that the metric a…
Higher-dimensional Buchdahl and Janis-Robinson-Winicour transformations in the Einstein-Maxwell system with a massless scalar field
Hideki Maeda, Cristian Martinez
We present higher-dimensional generalizations of the Buchdahl and Janis-Robinson-Winicour transformations which generate static solutions in the Einstein-Maxwell system with a mass…
Energy conditions in arbitrary dimensions
Hideki Maeda, Cristian Martinez
Energy conditions for matter fields are comprehensively investigated in arbitrary dimensions without specifying future and past directions locally. We classify an energy…
Exact black-hole formation with a conformally coupled scalar field in three dimensions
Luis Avilés, Hideki Maeda, Cristian Martinez
We present exact dynamical and inhomogeneous solutions in three-dimensional AdS gravity with a conformally coupled scalar field. They contain stealth configurations of the scalar f…