Семинар 28 ноября 2017. Martin Krssak. Modified Gravity Theories as Analogues of Non-linear Electrodynamics

*by: , @ Fri, 24 Nov 2017 13:42:10 +0400*

28 ноября 2017, в 12:45

Кафедра физики высоких энергий и элементарных частиц

Martin Krssak (Мартин Кршшак)

(Университет Тарту, Эстония)

Modified Gravity Theories as Analogues of Non-linear Electrodynamics

Recently various modifications and extensions of general relativity

became a popular subject of study due to various phenomenological and

theoretical reasons. One of such approaches is the so-called

teleparallel gravity, which originates with Einstein's 1920s attempts

for unified field theory, where instead of the usual Riemannian geometry

we use the geometry with ``distant parallelism" (a.k.a. teleparallel

geometry). An advantage of this approach is that it reveals close

structural analogies to electrodynamics, which are more hidden in the

usual formulation where gravity is attributed to the curvature of

spacetime. I will briefly introduce these models and show how every

teleparallel theory of gravity with second order field equations can be

formulated in an analogous way to the axiomatic construction of theories

of electrodynamics. I will explicitly demonstrate this construction for

some popular models as f(T) or teleparallel dark energy models.