6 papers · 1 filter
Worldline Higher Spin Gravity
Minkyeu Cho, Euihun Joung, Taehwan Oh +1
We propose a worldline formulation of higher-spin gravity (HSG) in , based on a simple twistor action. Taken at face value, the model describes only the free propag…
Manifest duality and Lorentz covariance for linearised gravity as edge modes
Calvin Y. -R. Chen, Euihun Joung, Karapet Mkrtchyan
We present the first formulation of linearised gravity in four dimensions which is manifestly Lorentz covariant and democratic, i.e. treats the two frames related by electric-magne…
Extracting Edge Modes: Reduction of 3D and 2D Gravities
Euihun Joung, Sejin Kim
We investigate the boundary reduction of 3D Einstein gravity and JT gravity into their respective edge mode theories - namely, the Liouville and Alekseev-Shatashvili, and Schwarzia…
Higher-order chiral scalar from boundary reduction of 3d higher-spin gravity
Calvin Yi-Ren Chen, Euihun Joung, Karapet Mkrtchyan +1
We use a recently proposed covariant procedure to reduce the Chern-Simons action of three-dimensional higher-spin gravity to the boundary, resulting in a Lorentz covariant action f…
Manifestly Covariant Worldline Actions from Coadjoint Orbits. Part I: Generalities and Vectorial Descriptions
Thomas Basile, Euihun Joung, TaeHwan Oh
We derive manifestly covariant actions of spinning particles starting from coadjoint orbits of isometry groups, by using Hamiltonian reductions. We show that the defining condition…
Manifestly Covariant Worldline Actions from Coadjoint Orbits. Part II: Twistorial Descriptions
Euihun Joung, TaeHwan Oh
Worldline actions for various twistor particles in AdS spacetimes are constructed from the coadjoint orbits of , and as constrained Hamiltonian…