### 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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Wormholes might allow effective superluminal faster-than-light travel by ensuring that the speed of light is not exceeded locally at any time. Black Holes and Time Warps. In this spacetime, it is possible to come up with coordinate systems such that if a hypersurface of constant time a set of points that all have the same time coordinate, llorentzian that every point on the surface has a space-like separation, giving what is called a ‘space-like surface’ is picked and an “embedding diagram” drawn depicting the curvature of space at that time, the embedding diagram will look like a tube connecting the two exterior regions, known as an “Einstein—Rosen bridge”.

Journal of Geometry and Physics.

### Wormhole – Wikipedia

A tool for teaching general relativity”. Retrieved 20 February By using this site, you agree to the Terms of Use and Privacy Policy. Principle of relativity Theory of relativity Frame visssr reference Inertial frame of reference Viser frame Center-of-momentum frame Equivalence principle Mass—energy equivalence Special relativity Doubly special relativity de Sitter invariant special relativity World line Riemannian geometry.

For both of these methods, time dilation causes the end of the wormhole that has been moved to have aged less, or become “younger”, than the stationary end as seen by an external observer; however, time connects differently through the wormhole than outside it, so that synchronized clocks at either end of the wormhole will always remain synchronized as seen by an observer passing lorenrzian the wormhole, no matter how the two ends move around.

However, it is known that quantum effects can lead to small measurable violations of the null energy condition, [6]: Alternatively, 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 visswr return it to a position near the other entrance.

## Matt Visser: Book

InMorris, Thorne and Yurtsever worked out how to convert a wormhole traversing space into one traversing time by accelerating one of its two mouths. However, in a paper, Visser hypothesized that a complex ” Roman ring ” named after Tom Roman configuration of an N number of wormholes arranged in a symmetric polygon could still act as a time machine, although he concludes that this is more likely a flaw in classical quantum gravity theory rather than proof that causality violation is possible.

An excellent and more concise review. Views Read Edit View history.

In lorentzan case, a wormhole would appear as a hole in that surface, lead into a 3D tube the inside surface of a wormholeathen re-emerge loreentzian another location on the 2D surface with a hole similar to the entrance. 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.

And just as there are two separate interior regions of the maximally extended spacetime, there are also two separate exterior visserr, sometimes called vsser different “universes”, with the second universe allowing us to extrapolate some possible particle trajectories in the two interior regions.

Torsion naturally accounts for the quantum-mechanical, intrinsic angular momentum spin of matter. Varna, Bulgaria, JuneSpringer,p. The solution depends on two parameters: Ellis specifically rejected referring to the scalar field as ‘exotic’ because of the antiorthodox coupling, finding arguments for doing so unpersuasive.

Wormholes are a common element in science fiction because they allow interstellar, intergalactic, and sometimes even interuniversal travel within human lifetime scales. Note that the Schwarzschild metric describes an idealized black hole that exists eternally from the perspective of external observers; a more realistic black hole that forms at some particular time from a collapsing star would require a different metric.

From Wikipedia, the free encyclopedia.

The drainhole is a solution manifold of Einstein’s field equations for a vacuum space-time, modified by inclusion of a scalar field minimally coupled to the Ricci tensor with antiorthodox polarity negative instead of positive. Here, “maximally extended” refers vissef the idea that the spacetime should not have any “edges”: The possibility of communication between parallel universes has been dubbed interuniversal travel.

To see why exotic matter is required, consider an incoming light front traveling along geodesics, which then crosses the wormhole and re-expands on the other side.

### Lorentzian wormholes: from Einstein to Hawking – Matt Visser – Google Books

Journal of Mathematical Physics. A follow-up paper to Misner and Wheeler December While traveling through a wormhole, subluminal slower-than-light speeds are used. An actual wormhole would be analogous to this, but with the spatial dimensions raised by one.

Wormholes connect two points in spacetime, which means that owrmholes would in principle allow travel in timeas well as in space. This theory extends general relativity by removing a constraint of the symmetry of the affine viwser and regarding its antisymmetric part, the torsion tensoras a dynamical variable.

Modern Physics Letters A.

University of Chicago Press. The Einstein—Rosen bridge was discovered by Ludwig Flamm in vosser, [10] a few months after Schwarzschild published his solution, and was rediscovered by Albert Einstein and his colleague Nathan Rosen, who published their result in Gravitational singularity Penrose—Hawking singularity theorems Primordial black hole Gravastar Dark star Dark-energy star Black star Eternally collapsing object Magnetospheric eternally collapsing object Fuzzball White visserr Naked singularity Ring singularity Immirzi parameter Membrane paradigm Kugelblitz Wormhole Quasi-star.

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.