15,566 research outputs found
Deformation of the Bodies by the Result of Length Contraction: A new Approach to the Lorentz Contraction
It has been more than a century since first Lorentz and later Einstein
explored relativistic events and still important consequences of that remains
unclear to everybody. The present study extensively focus on Lorentz (Length)
contraction phenomenon and takes a different approaches to explain how the
shrinking of the body appears if exists. We utilized two postulates of Special
Relativity that emphasizes constancy of speed of light and same physical laws
in any inertial frame. Finally, we propose Lorentz contraction exists in
different form through the shape of the accelerated body. The deformation of
its shape depends on the part where it is measured.Comment: 6 pages, 4 figure
Minimal Massive Gravity: Conserved Charges, Excitations and the Chiral Gravity Limit
We find the excitations and construct the conserved charges ( mass and
angular momentum) of the recently found Minimal Massive Gravity (MMG) in 2+1
dimensions in asymptotically Anti-de Sitter (AdS) spacetimes. The field
equation of the theory does not come from an action and hence lacks the
required Bianchi Identity needed to define conserved charges. But the theory,
which also provides a healthy extension of the Topologically Massive Gravity in
the bulk and boundary of spacetime, does admit conserved charges for metric
that are solutions. Our construction is based on background Killing vectors and
imperative to provide physical meaning to the integration constants in the
black hole type metrics. We also study the chiral gravity limit of MMG.Comment: 9 pages, reference added, typos correcte
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