8 citations · 13 across the 8 of their papers we have counts for
5 papers · 1 filter
Gravitational focusing and horizon entropy for higher-spin fields
Zihan Yan
Previously, the Raychaudhuri equation and the focusing theorem in General Relativity were generalised to diffeomorphism-invariant theories of gravity coupled to scalar and vector f…
A Comment on Deriving the Gibbons-Hawking-York Term From the String Worldsheet
Amr Ahmadain, Vasudev Shyam, Zihan Yan
In this note, we show that the noncovariant metric boundary term obtained from the nonlinear sigma model worldsheet derivation of the bulk off-shell sphere partition function is cl…
Properties of Dynamical Black Hole Entropy
Manus R. Visser, Zihan Yan
We study the first law for non-stationary perturbations of a stationary black hole whose event horizon is a Killing horizon, that relates the first-order change in the mass and ang…
Revisiting Schwarzschild black hole singularity through string theory
Houwen Wu, Zihan Yan, Shuxuan Ying
In this letter, we derive the singular condition for black holes and demonstrate the potential resolution of the Schwarzschild black hole singularity in general relativity using no…
Linearised Second Law for Higher Curvature Gravity and Non-Minimally Coupled Vector Fields
Aron C. Wall, Zihan Yan
Expanding the work of arXiv:1504.08040, we show that black holes obey a second law for linear perturbations to bifurcate Killing horizons, in any covariant higher curvature gravity…