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11
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2answers
2k views

How do wormholes work?

Firstly, I understand that we have no observational evidence for 'wormholes'. They are theorised solutions to general relativity equations. That said, if macroscopic wormholes do exist---how do they ...
0
votes
1answer
31 views

What is wormhole and how does it work? [duplicate]

I want to know what are wormholes, how they function and how they are formed. In understandable language, if possible.
1
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2answers
459 views

How would you connect a destination to a wormhole from your starting point to travel through it?

Lets say it was possible to create as massive traversable wormholes as we want. Say we started from earth and wanted to cross to alpha centauri. How would I create the wormhole so that it leads ...
2
votes
0answers
26 views

If a wormhole connects between ground and sky, does an object require extra energy to pass through it? [duplicate]

As we know, if we bring an object from ground to sky (higher position) by normal methods, extra energy is required to overcome the gravitational potential energy. Then if a wormhole connects between ...
-8
votes
2answers
223 views

Presentism: doesn't everything exist at the same moment? [closed]

The Help Center recommends I 'fix' this question: (original question) "It seems self-evident that everything exist in the Now. Notwithstanding time-dilation and different rates of the passage of ...
1
vote
0answers
101 views

Hawking radiation at the mouth of Schwarzschild wormholes

I was researching a question for another post and it occurred to me that you might expect to see Hawking radiation at the mouth of wormholes. Given the mechanism of Hawking radiation at the event ...
0
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0answers
30 views

Would it be theortically possible to use wormholes to travel short distances? i.e. UK to America [duplicate]

This being if Wormholes are possibly (which I know they're currently not possible). As wormholes as usually described to travel long distances across the galaxy or multiple galaxy's. Could wormholes ...
0
votes
0answers
26 views

Wave equation for odd spacetimes and source terms

It seems to be quite common practice, when solving the wave equation in spacetimes with odd topologies or horizons, to decompose the solution into a sum of the various origins (or destinations) of the ...
-1
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3answers
424 views

Energy Required to Rip Spacetime

I have heard that the presence of an extremely strong gravitational field possesses the capacity to warp or tear spacetime and to potentially create a wormhole. Is any energy lost when spacetime is ...
2
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0answers
62 views

Field solution for spacetimes with identified regions

For a spacetime surgery wormhole, we have a manifold such that, for two connected compact sets $D_1$ and $D_2$, we remove $D_1$ and $D_2$ from the manifold and identify their boundaries. According to ...
-13
votes
1answer
112 views

What are your views on this explanation of reincarnation using physics? [closed]

https://www.youtube.com/watch?v=GT8iVYfg9eM "Skeptical scientists keep dismissing the concept of reincarnation based on the fact that there is no need for a soul. However, one of the most skeptical ...
15
votes
4answers
1k views

Could the black hole in the center of the galaxy be a white hole?

In the center of the galaxy there is a strong radio source which we call Sagittarius A*. Based on the high speed and orbit of nearby stars we have calculated that something with the mass of more than ...
4
votes
1answer
3k views

Would a wormhole in space look like anything at all?

In movie "Interstallar", the wormhole is elaborately depicted as a sphere, complete with explanation about why it is spherical, and as it is approached, it looks like a sphere containing fabulous ...
2
votes
1answer
49 views

Charge without charge and non-traversable wormholes

My question concerns the theory proposed in this classic paper by Misner and Wheeler. In the paper, the authors propose the idea of "charge without charge"--namely, that positive and negative ...
0
votes
1answer
47 views

Wormhole Construction & ~ “Jump Conditions”

Throughout the literature Wormholes are typically constructed by "Minkowski" or "Schwarzschild Surgery" (see e.g. Visser, Lorentzian Wormholes...), i.e. under quite simple and/or highly symmetric ...
1
vote
0answers
32 views

Applying AdS-CFT to traversable wormholes? [closed]

ER=EPR recently brought up the connection between non-traversable wormholes and entanglements. What about traversable wormholes? Can we apply AdS/CFT to traversable wormholes?
1
vote
2answers
40 views

Why do relativistic wormholes have to be brought together to make a “time machine”?

In "From wormhole to time machine: Comments on Hawking’s Chronology Protection Conjecture" by Matt Visser (http://arxiv.org/abs/hep-th/9202090), he summarizes how "time machines" may be created from ...
4
votes
1answer
217 views

Moving the endpoints of a wormhole towards each other

Suppose we have a perfectly safe portal/wormhole and we place the two endpoints facing each other so that a person between them would see an endless corridor (with infinite number of herself). What ...
1
vote
1answer
265 views

Wormholes and the illusion of time?

I was watching a video on Youtube by Brian Greene, "the illusion of time."http://www.youtube.com/watch?v=j-u1aaltiq4 In that video, he introduces to me the idea of a "brane," or a slice of the ...
2
votes
1answer
61 views

Do wormholes only allow FTL travel in “folded” spacetime?

Faster than light wormhole travel depicted in science fiction and in popular science articles seems to assume that rather than being flat (with dimples centered around large masses), spacetime is ...
8
votes
2answers
396 views

Calculating the mass of a wormhole

What would for an observer be the mass of an isolated Wormhole (meaning that there is no gas and no mass of stars arround it) if the wormhole mouth oposite to the observer reflects the light of a ...
6
votes
1answer
191 views

Can we tell a wormhole from a black hole by observation?

I'm assuming stable wormhole really exist (naturally/microscopic or not) how can we distinguish between a wormhole and a black hole since we can't probe their "insides"?
1
vote
0answers
46 views

Neck size of wormholes in shape dynamics

As far as a dilettante like me knows, in shape dynamics, black holes are really wormholes. What it the expected diameter of the necks of such wormholes (both for regular holes resulting from the ...
0
votes
1answer
47 views

Planets falling through wormholes

I am writing a story which will use a wormhole of one sort or another as a plot device to put an aliens' planet in our solar system. I'd like to know: How big a wormhole would have to be for tidal ...
22
votes
4answers
4k views

Wormholes & Time Machines - for *experts* in GR/maths

EDIT: Further clarification in the context of answers/comments received to 20 Jan has been appended EDIT: 21 Jan - Response to the Lubos Expansion appended [in progress, not yet complete] EDIT: 23 ...
0
votes
2answers
179 views

Would the speed of an object keep increasing if it keeps falling infinitely? Please check details [closed]

Assuming "A" and "B" to be two wormholes (Einstein-Rosen Bridge) inside the Earth's atmosphere, and Warmhole B be the opening to Warmhole A, would the speed of an object keep increasing if it enters ...
0
votes
1answer
76 views

What are negative and positive energies? [closed]

So I have a few questions related to the negative and positive energy topic. 1)What do we mean by negative and positive energies in physics? 2)I have seen in a minute physics video that we need ...
-2
votes
1answer
84 views

Can humans make white holes [closed]

I have a question that i could not find on any site on the internet. do humans have the ability to create white holes, and if so could it be used to stabilize a wormhole.
1
vote
1answer
89 views

Is entropy violated inside black holes and worm holes?

Do the laws of thermodynamics hold true everywhere in universe ? What about black holes and worm holes ?
1
vote
2answers
411 views

How would the Casimir effect stabilize wormholes?

According to various sources, the Casimir effect could theoretically be used to stabilize a two-way wormhole because it "simulates" the negative energy exotic matter that would normally be required. ...
2
votes
1answer
160 views

Travelling through a worm hole

In every documentary I've seen about worm holes, I have noticed that they usually say that according to the General Theory of Relativity, there could exist worm holes called traversable wormholes; ...
2
votes
3answers
311 views

Wormhole traversability in general relativity

It is well known that stable, traversable wormholes require exotic matter that violate the dominant energy conditions. For the purpose of the question, let's assume enough exotic matter can be ...
3
votes
4answers
465 views

Conservation of potential energy for a wormhole

So you managed to build a stable traversable wormhole. Somehow you managed to acquire the exotic negative-tension materials with sufficient densities to make it all work. Now you place opening A of ...
3
votes
4answers
8k views

What is negative Energy/Exotic Energy?

So I have been researching around a little as I am highly interested in Astrophysics and I came across an energy I have never heard of before; negative energy also commonly known as exotic energy. Now ...
0
votes
2answers
170 views

Dark Energy and Wormhole stability

Is it possible that the "negative energy" needed to create stable wormholes as theorized by Morris and Thorne (?) could be dark energy? Could this be the "exotic" negative energy matter referred to?
0
votes
1answer
223 views

Do wormhole exits require matter? If not, would they change the edge of the universe?

As a layperson who watches way too many theoretical physics and astronomy documentaries, I've seen the folded-piece-of-paper analogy of wormholes a bajillion times. Usually they explain that black ...
0
votes
1answer
421 views

Wormholes with event horizons?

Under General Relativity, Lorentzian wormholes (the kind that are traversable) require exotic matter (a kind of unobtainium which is not known to exist). On the other hand, we know black holes exists ...
19
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1answer
854 views

Building a wormhole

We regularly get questions about wormholes on this site. See for example Negative Energy and Wormholes and How would you connect a destination to a wormhole from your starting point to travel through ...
4
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1answer
970 views

Negative Energy and Wormholes

Apparently to create wormholes you need negative energy/matter. Say you had negative matter/energy, how would it be applied towards making a wormhole?
-1
votes
2answers
196 views

If spacetime is folded upon itself [closed]

Say there are two black holes about a parsec apart. You theoretically fold spacetime upon itself so that the singularities of the black holes are "touching". So the picture link I left above shows ...
-1
votes
1answer
638 views

Are black holes in a binary system with white holes, and are they both wormholes? [closed]

What is a black hole? The general explanation is that a black hole is small region in space with such strong gravitational effects that nothing can escape and even light is trapped inside of the event ...
0
votes
1answer
218 views

Do wormholes violate causality [duplicate]

Does opening and closign a wormhole to send a message within seconds across the galaxy violate causality? Wouldn't different observers disagree about the order of events and what effected what? Is ...
6
votes
1answer
110 views

Charged versus rotating black holes as different kinds of wormholes

I've heard that a maximally extended charged black hole can be a traversable wormhole to the same universe whereas a maximally extended uncharged rotating black hole can only be a wormhole to ...
1
vote
1answer
40 views

Does a wormhole on the event horizon keep working?

Recently the discovery of how to build a magnetic wormhole has been all over the news. These wormholes tunnel magnetic fields instantly from one point to another point. (Although the current model is ...
1
vote
4answers
135 views

How would the twins paradox be affected by wormholes?

The famous twins paradox where one twin travels to a distant star and returns to find an aged brother can be resolved with general relativity pretty easily, but I was wondering about this: If the ...
10
votes
5answers
5k views

Where does light go after it enters a black hole?

Nothing passes through a black hole. Where do things go then? If light enters a black hole, what happens to it? Do things go to a white hole and resume in another universe?
1
vote
2answers
240 views

Do Entangled Particles communicate through Wormholes? [closed]

If so, would this “spooky action at a distance” still be spooky if that “distance” is actually shorter than it appears? Sorry if this is a Noob question. Just trying to understand how Entangled ...
1
vote
1answer
35 views

How would a wormhole affect forces between objects close to on both sides?

Let me try to break my question down by considering a hypothetical wormhole connecting the Solar system and the Alpha Centauri system: Would such a wormhole effectively decrease the distance between ...
4
votes
1answer
190 views

Do gravational effects 'travel' through a wormhole?

Lets say a wormhole exists with point A inside the gravity well of a star and point B in a space where there is no notable nearby mass to create a gravitational force. If one were to approach point B, ...
0
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1answer
96 views

The age of black holes

I have a very small understanding of space-time however I have been watching some interviews and reading articles featuring theoretical physicist Kip Thorne and I have a few questions that I hope can ...