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gr-qc2018★ 5 cited
Helicity and spin conservation in Maxwell theory and Linearized Gravity
Sajad Aghapour, Lars Andersson, Reebhu Bhattacharyya
A duality symmetric formulation of linearized gravity has been introduced by Barnett and used to show the conservation of helicity. However, the relation between helicity and spin…
gr-qc2018★ 12 cited
On variational principle and canonical structure of gravitational theory in double-foliation formalism
Sajad Aghapour, Ghadir Jafari, Mehdi Golshani
In this paper, we analyze the variation of the gravitational action on a bounded region of spacetime whose boundary contains segments with various characters, including null. We de…