spacetimeenergy
Spacetimeenergy is a term used in some theoretical discussions and in science fiction to denote a proposed quantity that measures the energy content associated with the structure of spacetime itself, as distinct from the energy of matter and radiation. In these discussions, spacetimeenergy aims to quantify the energy stored in spacetime curvature and the dynamical gravitational field, and may be treated as a scalar field or as a contribution in a broader energy budget of a system.
In mainstream physics, energy and momentum are described by the stress-energy tensor in general relativity, which
Some speculative approaches or speculative fiction handwaves treat spacetimeenergy as a property of spacetime itself, sometimes
Practically, if spacetimeenergy is used, its meaning must be explicitly defined, including how it is computed,
See also: stress-energy tensor, Einstein field equations, ADM energy, Bondi energy, gravitational energy, vacuum energy, dark