2015/02/28 by H. Lu, A. Perkins, C. N. Pope +1 · 1 citation
Physics and Astronomy · #hep-th #gr-qc
paper · pdf · doi:10.1103/physrevlett.114.171601
published as Phys. Rev. Lett. 114, 171601 (2015) · Typos corrected, discussion added, figure changed. 4 pages, 6 figures
arxiv created 2015/04/14 · arxiv updated 2015/05/06
Extensions of Einstein gravity with higher-order derivative terms arise in string theory and other effective theories, as well as being of interest in their own right. In this paper we study static black-hole solutions in the example of Einstein gravity with additional quadratic curvature terms. A Lichnerowicz-type theorem simplifies the analysis by establishing that they must have vanishing Ricci scalar curvature. By numerical methods we then demonstrate the existence of further black-hole solutions over and above the Schwarzschild solution. We discuss some of their thermodynamic properties, and show that they obey the first law of thermodynamics.