Non-Riemannian gravitational interactions

Tucker, Robin and Wang, Charles (1997) Non-Riemannian gravitational interactions. Banach Center Publications, 41. pp. 263-271. ISSN 0137-6934

Abstract

Recent developments in theories of non-Riemannian gravitational interactions are outlined. The question of the motion of a fluid in the presence of torsion and metric gradient fields is approached in terms of the divergence of the Einstein tensor associated with a general connection. In the absence of matter the variational equations associated with a broad class of actions involving non-Riemannian fields give rise to an Einstein-Proca system associated with the standard Levi-Civita connection.