Results 21 to 30 of about 16,496 (311)
(Chiral) Virasoro invariance of the tree-level MHV graviton scattering amplitudes
Journal of High Energy Physics, 2022 In this paper we continue our study of the tree level MHV graviton scattering amplitudes from the point of view of celestial holography. In arXiv:2008.04330 we showed that the celestial OPE of two gravitons in the MHV sector can be written as a linear ...
Shamik Banerjee +2 more
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Journal of High Energy Physics, 2022 Bondi-Metzner-Sachs (BMS) symmetries, or equivalently Conformal Carroll symmetries, are intrinsically associated to null manifolds and in two dimensions can be obtained as an Inönü-Wigner contraction of the two-dimensional (2d) relativistic conformal ...
Arjun Bagchi +2 more
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Soft charges and electric-magnetic duality
Journal of High Energy Physics, 2018 The main focus of this work is to study magnetic soft charges of the four dimensional Maxwell theory. Imposing appropriate asymptotic falloff conditions, we compute the electric and magnetic soft charges and their algebra both at spatial and at null ...
V. Hosseinzadeh +2 more
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Extensions of the asymptotic symmetry algebra of general relativity
Journal of High Energy Physics, 2020 We consider a recently proposed extension of the Bondi-Metzner-Sachs algebra to include arbitrary infinitesimal diffeomorphisms on a 2-sphere. To realize this extended algebra as asymptotic symmetries, we work with an extended class of spacetimes in ...
Éanna É. Flanagan +2 more
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Diffeomorphisms as quadratic charges in 4d BF theory and related TQFTs
Journal of High Energy Physics, 2023 We present a Sugawara-type construction for boundary charges in 4d BF theory and in a general family of related TQFTs. Starting from the underlying current Lie algebra of boundary symmetries, this gives rise to well-defined quadratic charges forming an ...
Marc Geiller +3 more
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CURRENT ALGEBRA AND η→ 3π [PDF]
Nuclear Physics B, 1968 Abstract A critical review is given of developments in the theory subsequent to the demonstration that in first approximation η → 3 π is forbidden. It remains difficult to understand the process with conventional ideas without reducing to an accident the success of current algebra, and a simple linear matrix element, in K → 3 π .
J.S. Bell, D.G. Sutherland
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CURRENT ALGEBRA FUNCTORS AND EXTENSIONS [PDF]
Reviews in Mathematical Physics, 2013 We show how the fundamental cocycles on current Lie algebras and the Lie algebra of symmetries for the sigma model are obtained via the current algebra functors introduced in [A. Alekseev and P. Severa, Equivariant cohomology and current algebras, Confluentes Math.4 (2012) 1250001, 40 pp.]. We present current group extensions integrating some of these
Alekseev Anton +2 more
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Journal of High Energy Physics, 2021 We construct a Poisson algebra of brane currents from a QP-manifold, and show their Poisson brackets take a universal geometric form. This generalises a result of Alekseev and Strobl on string currents and generalised geometry to include branes with ...
Alex S. Arvanitakis
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Menagerie of AdS2 boundary conditions
Journal of High Energy Physics, 2017 We consider different sets of AdS2 boundary conditions for the Jackiw-Teitelboim model in the linear dilaton sector where the dilaton is allowed to fluctuate to leading order at the boundary of the Poincaré disk.
Daniel Grumiller +4 more
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Discrete‐time modelling and stability analysis of wireless power transfer system
IET Power Electronics, 2021 Wireless power transfer (WPT) has been widely used in recent years due to its convenient access to power and security in some specific cases. However, the inherent non‐linearity of the WPT system can result in unexpected stability problems. In this paper,
Xiufang Hu +5 more
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