Einstein's theory of general relativity allows for both time travel and faster-than-light travel, with a spacecraft in a warped space-time bubble potentially able to travel back in time.

A Warped View of Time Travel

Negative germs can potentially enable humans to travel faster than the speed of light, potentially enabling us to pass through black holes and discover undiscovered galaxies.

How We Can Travel Faster Than the Speed of Light

The paradox of faster-than-light matter remains unresolved, and quantum-mechanical uncertainties also fail to resolve it.

Implications of Causality for Faster-than-Light Matter

Einstein's field equations may allow for faster-than-light travel, parallel universes, and past/future time travel, but incorporating these capabilities into a suitable propulsion system is crucial for colonizing and exploring unknowns in the cosmos.

Ramifications of Einstein's Field Equations for Creating Advanced Propulsion Schemes

Time travel into the past and causality violation occur only at speeds "greater than" infinity, refuting the block universe concept and preventing causality paradoxes.

Causality Between Events with Space-Like Separation

This course explores the possibility of faster-than-light travel and time travel within the context of general relativity and quantum field theory, examining warp drives, wormholes, and time travel paradoxes.

Lectures on faster-than-light travel and time travel

Faster than light motion in Minkowski spacetime does not imply time travel, and all observers are equivalent, despite the possibility of causality violations.

Faster than light motion does not imply time travel

Einstein's field equations may lead to anomalous gravitational distortions, potentially enabling faster-than-light travel, parallel universes, and past/future time travel.

Consequences of Unusual Behaviour in Einstein's Field Equations for Advanced Propulsion Schemes

A "pre-emptive" chronology protection mechanism can destabilize superluminal warp drives, forbidding the use of these solutions for building a time machine in both standard quantum field theory and quantum field theory with Lorentz invariance breakdown.

Do not mess with time: Probing faster than light travel and chronology protection with superluminal warp drives

Superluminal travel requires weak-energy condition violation, as it requires the path to reach a destination surface at an earlier time than any neighboring path.

Superluminal travel requires negative energies

Clocks and rods moving faster than the speed of light may experience time contraction and Lorentz expansion, respectively, in agreement with earlier articles on the subject.

Particle velocities faster than the speed of light

Superluminal warp drives may be able to prevent the stability of spacetimes allowing faster than light propagation, potentially preventing the construction of time machines.

Probing Faster than Light Travel and Chronology Protection with Superluminal Warp Drives

Faster-than-light travel, using tachyons, wormholes, and warp drives, could potentially enable human race to travel to the stars within their lifetimes.

Destination Universe: Some Thoughts on Faster-Than Light (FTL) Travel

Light allows time travel, allowing advanced precision in science and metrology, and could potentially revolutionize our understanding of dark matter and gravitational waves.

Light and the distribution of time

The Tachyon Nexus web site provides reliable information on time travel and faster-than-light particles, benefiting students and teachers.

The Tachyon Nexus: An Educational Resource on Tachyons and Time Travel

The Alcubierre Drive concept proposes a spacecraft that could achieve faster-than-light travel by manipulating spacetime, creating a warp bubble and circumventing the speed of light limitations.

Warp Drive Concept: Harnessing the McGinty Equation’s Fractal Potential for Faster-Than-Light Travel

The tachypomp method was flawed due to Einstein's special theory of relativity, which clarified why it could not work as described in Mitchell's story.

Faster than Light Travel

Time travel is possible, but it involves oddities rather than impossibilities, and a possible world with time travel would be different from ours.

The Paradoxes of Time Travel

This paper presents the first practical technology solution for traveling faster than the speed of light, enabling light-years of distance to be traversed by performing millions of "hops" in a fraction of a second.

Faster Than Light Travel: The Basic Mechanics

Some studies suggest that faster-than-light travel could enable time travel based on general relativity and Einstein's field equations, while other studies highlight unresolved paradoxes and mechanisms that may prevent such possibilities.