## 58 Citations

Weak Energy Condition Violation and Superluminal Travel

- Physics
- 2002

Recent solutions to the Einstein Field Equations involving negative energy densities, i.e., matter violating the weak-energy-condition, have been obtained, namely traversable wormholes, the…

Superluminal Travel Made Possible (in two dimensions)

- Physics
- 2008

We argue that superluminal signal propagation is possible in consistent Poincare invariant quantum field theories in two space-time dimensions, provided spatial parity is broken. This happens due to…

On Swift Gravitons

- Physics
- 2015

We use the method of characteristics to study superluminal graviton (thereof called swift graviton) propagation in theories of higher curvature gravity of the form (Riemann)2, (Riemann)3,…

Exotic solutions in General Relativity: Traversable wormholes and 'warp drive' spacetimes

- Physics
- 2007

The General Theory of Relativity has been an extremely successful theory, with a well established experimental footing, at least for weak gravitational fields. Its predictions range from the…

Superluminality in the Fierz-Pauli massive gravity

- Physics
- 2008

We study the propagation of helicity-1 gravitons in the Fierz–Pauli massive gravity in nearly Minkowski backgrounds. We show that, generically, there exist backgrounds consistent with field…

A pr 2 00 2 Weak energy condition violation and superluminal travel

- Physics
- 2002

Recent solutions to the Einstein Field Equations involving negative energy densities, i.e., matter violating the weak-energy-condition, have been obtained, namely traversable wormholes, the…

Closed timelike curves and ‘effective’ superluminal travel with naked line singularities

- PhysicsClassical and Quantum Gravity
- 2018

We examine closed timelike curves (CTCs) and ‘effective’ superluminal travel in a spacetime containing naked line singularities, which we call ‘wires’. Each wire may be straight-line singularity or a…

Subluminal galilean genesis

- Physics
- 2013

A bstractWe put forward an improved version of the Galilean Genesis model that addresses the problem of superluminality. We demote the full conformal group to Poincaré symmetry and dilations,…

Proving the achronal averaged null energy condition from the generalized second law

- Physics
- 2010

A null line is a complete achronal null geodesic. It is proven that for any quantum fields minimally coupled to semiclassical Einstein gravity, the averaged null energy condition (ANEC) on null lines…

The generalized second law forbids singularity resolution, viable baby universes, traversable wormholes, warp drives, time machines, and negative mass objects

- Physics
- 2010

The generalized second law can be used to prove a singularity theorem, by generalizing the notion of a trapped surface to quantum situations. Like Penrose’s original singularity theorem, it implies…