5 papers
Tamm-Rubilar branch diagnostics for Drummond-Hathrell photon propagation: Schwarzschild calibration and a Kerr weak-lensing benchmark
José Rodal
This paper develops a local Tamm-Rubilar branch diagnostic for supplied nondispersive, pair-symmetric constitutive tensors and uses it as a preprocessing layer for polarization-res…
Visualization and analysis of the curvature invariants in the Alcubierre warp-drive spacetime
José Rodal
In the Alcubierre warp-drive spacetime, we investigate the following scalar curvature invariants: the scalar , derived from a quadratic contraction of the Weyl tensor, the trace…
A Closer Look at Natário's Zero-Expansion Warp Drive
José Rodal
We conduct a detailed analysis of Nat'{a}rio's ``zero-expansion'' warp drive spacetime, focusing on scalar curvature invariants within the 3+1 formalism. This paper has four primar…
A warp drive with predominantly positive invariant energy density and global Hawking-Ellis Type I
José Rodal
We present the first fully explicit, continuous, analytically derived warp-drive spacetime within General Relativity whose shift-vector flow is kinematically irrotational. Building…
On the Infeasibility of Low-Energy Warp Drive via Metamaterial Gravitational Coupling
José Rodal
Recent ``low-energy'' warp-drive concepts propose replacing the constant gravitational coupling with a spatially varying scalar field set by an engineered metamateri…