Seminarium "The Trans-Carpathian Seminar on Geometry & Physics"

In spite of General Relativity Theory being around for over a century, we still do not have a satisfactory understanding of the concept of energy of the gravitational field. The very nature of Einstein's theory makes this supposedly basic physical concept highly non-trivial. Although one can assign a value of global energy to some gravitating systems, the concept of local energy density of gravity turns out to be meaningless.As a way around this, researchers are trying to define energy for finite, but extended regions of spacetimes. This is the still open problem of quasi-local mass. I will discuss some of the difficulties that make the search for a viable definition of quasi-local energy so challenging and show how the approximated theory of linearized gravity may offer some clues in the subject.

Zoom Meeting ID: 840 5801 4241, Passcode: algebroid