## LORENTZIAN WORMHOLES VISSER PDF

Lorentzian wormholes: From Einstein to Hawking. Matt Visser (Washington U., St. Louis). ISBN: , Lorentzian wormholes: from Einstein to Hawking. Front Cover. Matt Visser. AIP Press, American Institute of Physics, – Science – pages. @ 23 January ; LATEX-ed Keywords: traversable wormholes, Lorentzian wormholes. Physical Review D

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### Lorentzian wormholes: From Einstein to Hawking – INSPIRE-HEP

For example, instead of circular holes on a 2D planethe entry and exit points could be visualized as spheres in 3D space. Phenomena Gravitoelectromagnetism Kepler problem Gravity Gravitational field Gravity well Gravitational lensing Gravitational waves Gravitational redshift Redshift Blueshift Time dilation Gravitational time dilation Shapiro time delay Gravitational potential Gravitational compression Gravitational collapse Frame-dragging Geodetic effect Gravitational singularity Event horizon Naked singularity Black hole White hole.

However, a light beam traveling through the same wormhole would of course beat the traveler.

A tool for teaching general relativity”. Vissser, another way is to take one entrance of the wormhole and move it to within the gravitational field of an object that has higher gravity than the other entrance, and then return it to a position near the other entrance.

In other projects Wikimedia Commons. Later, other types of traversable wormholes were discovered as allowable solutions to the equations of general relativity, including a variety analyzed in a paper by Matt Visserin which a lorentzisn through the wormhole can be made where the traversing path does not pass through a region of exotic matter.

## Matt Visser: Book

If two points are connected loentzian a wormhole whose length is shorter than the distance between them outside the wormhole, the time taken to traverse it could be less than the time it would take a light beam to make the journey if it took a path through the space outside the wormhole. Wormholes that could be crossed in both directions, known as traversable wormholeswould only be possible if exotic matter with negative energy density could be used to stabilize them.

Journal of Nonlinear Phenomena in Complex Systems. International Wormholss of Modern Physics D. Retrieved 20 February Another way to imagine wormholes is to take a sheet of paper and draw two somewhat distant points on one side of the paper.

This suggests that a wormhole time machine with an exceedingly short time jump is a theoretical bridge between contemporaneous parallel universes.

The possibility of traversable wormholes in general relativity was first demonstrated in a paper by Homer Ellis [30] and independently in a paper by K. To see why exotic matter is required, consider an incoming light front traveling wormmholes geodesics, which then crosses the wormhole and re-expands on the other side.

An example oorentzian a traversable wormhole metric is the following: An actual wormhole would be analogous to this, but with the spatial dimensions raised by one. The Birth of Wormholes”. One end of the wormhole is accelerated to some significant fraction of the speed of light, perhaps with some advanced propulsion systemand then brought back to the point of origin.

In this way it would be much easier to traverse the distance since the two points are now touching. Theories of wormhole metrics describe the spacetime geometry of a wormhole and serve as theoretical models for time travel. An Introduction 2nd ed.

Thermodynamics Schwarzschild radius M—sigma relation Event horizon Quasi-periodic oscillation Photon sphere Innermost stable circular orbit Ergosphere Hawking radiation Penrose process Blandford—Znajek process Bondi accretion Spaghettification Gravitational lens. An excellent and more concise review. Energy conditions in the Boulware vacuum”.

Classical and Quantum Gravity. Retrieved December 2, Introduction History Mathematical formulation Tests. By using this site, you agree to the Terms of Use and Privacy Policy. While traveling through a wormhole, subluminal slower-than-light speeds are used. Grandfather paradox Causal loop. Torsion naturally accounts for the quantum-mechanical, intrinsic angular momentum spin of matter. A possible resolution to the paradoxes resulting from wormhole-enabled time travel rests on the many-worlds interpretation of quantum mechanics.

An alternative to cosmic inflation”. In David Deutsch showed that quantum theory is fully consistent in the sense that the so-called density matrix can be made free of discontinuities in spacetimes with closed timelike curves.