Questions tagged [wormholes]
The wormholes tag has no usage guidance.
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When to use an orthonormal basis in GR?
I am working on a problem in the textbook Gravity: An Introduction to Einstein's General Relativity by Hartle. The problem is to show that an observer moving radially through the throat of the ...
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Would CTCs in wormholes change physical laws?
A wormhole is a speculative structure linking disparate points in spacetime, and is based on a special solution of the Einstein field equations solved using a Jacobian matrix and determinant.
(https:...
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1answer
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How would you make wormholes? [duplicate]
I know very little about general relativity. I know that objects with mass bend space. How would you arrange objects to get a wormhole? My main problem is that I do not understand how you would change ...
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2answers
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Time direction in the BH parallel exterior region
In the III region of the maximally extended Schwarzschild solution, described in the Kruskal coordinates , Sch. time runs in the reversed direction as compared to the I - event horizon III-II of the ...
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2answers
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Could spooky action at a distance be explained by particles staying linked in another dimension? [closed]
The math suggests that there are 11 or more "dimensions", most of which we know very little about. What if entangled particles are linked in one of those "other dimensions" and when we separate them ...
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1answer
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Is ER= EPR a Hidden Variable Theory & If NOT Why?
John Bell showed that entanglement cannot be a local hidden variable theory in 1964. Leonard Susskind and Juan Malcadena have proposed that non-traversable wormholes, Einstein-Rosen bridges (ER) are ...
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Does time exist at the center of a Black Hole?
A black hole is a wormhole resulting from a dead Star which is capable of sucking any mass/matter along its path due to Gravity. I was wondering what time would be like at the central point of the ...
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1answer
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What creates three dimensional wormholes? [duplicate]
I read online that wormholes are formed when the fabric of space time is bent, but visualisation was the bending of two dimensional space with a three dimensional object. So what bends three ...
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On the topology of the Einstein-Rosen bridge
I am currently working with Harvey Reall's notes on Black holes, and I have 2 questions concerning the interpretation of the Einstein-Rosen bridge.
After some algebra, we are faced with the metric:
$$...
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Timehole - Black hole physics [closed]
If someone could shed some light so that I can think straight again that would be appreciated..
Anywho, since watching a video on what the universe may look like in trillions of years (each atom ...
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How wormhole in this paper behave?
I discovered this paper that describes a wormhole without the use of exotic mass, and wondered at what's this wormhole's behavior. The problem is I don't know what most of equation on this paper is ...
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What would happen to a person's body if they entered a black hole? [duplicate]
One of the premises of the classic sci-fi show Farscape is that a person could travel through black holes, I'm curious as to what exactly would happen to a person body if you were to enter a black ...
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Super collider and black hole [closed]
I've read somewhere that to create a wormhole we would have to build a supercollider on the side of the solar system. If we were capable of doing this, would a supercollider of this scale create its ...
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Does the physical separation of wormhole mouths in real space affect transit time through the throat?
So I've somehow built my wormhole. I've stuffed the thing with negative energy so it's stable and traversable. I've got one end in orbit around Earth and the other in orbit around Mars.
My question ...
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Kip Thorne's time traveling wormhole and conservation of energy
Using this article as a basis: https://www.space.com/28000-physicist-kip-thorne-wildest-theories.html
So you build a wormhole, put one end in your backyard (for convenience your backyard is on an ...
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1answer
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Why do wormholes necessarily alter time? Why don't they just make two places causally linked?
I've heard many-an-explanation of wormholes. From as a kid with the hole punch through paper, to the sci-fi something something magic, to popular YouTube science channels talking about how it could ...
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Wormholes and Time Machines
According this paper:
Morris, Michael S. and Thorne, Kip S. and Yurtsever, Ulvi (1988) Wormholes, time machines, and the weak energy condition. Physical Review Letters, 61 (13). pp. 1446-1449. ...
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Can we use entangled black holes to form wormholes?
If any object can be made black hole by crushing it to its Schwarzschild radius, can we do the same process in two different points in the space keeping the quantum states of both the objects ...
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Effective mass of Ellis wormholes
Ellis wormholes are (described as) curved in space only, with no component of their curvature in the time part of spacetime. The geometry therefore causes no gravity.
If my understanding of ...
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1answer
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Could I see my back using a wormhole? [closed]
I was wondering if in a possible future we could see our own back using a wormhole instead of using a couple of mirrors.
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1answer
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Exterior derivative for the electrostatics of a wormhole
I am working in a manifold diffeomorphic to $\mathbb{R} \times \mathbb{S}^2$ with metric
$$g = dr^2 + f(r)^2\left(d\theta + \sin^2\theta~d\phi\right)$$
where $f(r)$ is always positive. Now, I posit ...
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Is a time loop possible? [duplicate]
Let's say that hypothetically we could travel faster than light. Would a ship travelling at lightspeed or faster than light travel create a time loop where it makes the same trip over and over again ...
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1answer
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Closed Trajectories in wormhole
This might seem trivial but if I want to go about finding closed trajectories in a wormhole with a metric:
$$ds^2=-dt^2+dr^2+(b^2+r^2)(d\theta^2+sin^2\theta d\phi^2)$$ how should I approach that?
Is ...
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1answer
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Would communication of information from the future require a block time structure? [closed]
If faster-than-light travel (through wormhole tunneling or some other exotic means) was discovered in future, such that it allows information to be communicated from the future to the present, what ...
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1answer
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Why can one not traverse a wormhole? Does it decay? Does it take infinite time to reach a wormhole?
Suppose that a wormhole is not traversable. But a wormhole is just spacetime, so what are the reasons why one cannot traverse a wormhole? If something tries to traverse a wormhole, would it be trapped ...
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What is time travel and why is the grandfathers Paradox a Paradox?
While watching a talk given by Neil DeGrase Tyson, he says that if something happens on earth, it would take light 2 million years to get to Andromeda. In theory, if you could generate a wormhole and ...
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How to detect a wormhole?
Question
A wormhole is a possible solution to Einstein field equations. As far as I understand, the fact that they are a possible solution does not mean they actually exist.
Are we looking for ...
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1answer
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Could I enter in a wormhole?
Reading a question on sci-fi stack exchange I find the wikipedia article on Novikov self-consistency principle in which is described the Polchinski paradox and the solution proposed by Thorne and some ...
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2answers
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Would it be possible for a human to simply “step” through a traversable wormhole?
(For the purposes of a science-fiction story where the author is attempting to have as much basis in fact as possible) if one were to create or make use of a Morris-Thorne or similar traversable ...
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1answer
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Do wormholes violate the conservation of Interval
I have heard that wormholes are valid solutions to the field equations, like black holes or anything else. However, for everything I've learned about relativity and what wormholes are supposed to be ...
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1answer
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Do polyhedral wormholes make sense?
Visser defines some class of wormholes with polyhedral mouthes, as a limit of smoothed polyhedrons as the radius of the edges go to zero. Does this limit actually make sense, as an actual spacetime? ...
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1answer
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Experimental Proof of Einstein-Rosen bridge
Question:
There are mathematical proofs available for the Einstein-Rosen bridge. But I was wondering whether there is experimental proof for such a thing. The general theory of relativity supports ...
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Can the mouths of a worm-hole be torus shaped?
Theoretically, most wormholes should have spherical mouths (if they exist). Could have a wormhole have torus-shaped mouths? What about other shapes?
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Is a self-wormhole possible?
If we think of a wormhole as two blackholes where points on each horizon are identified. Should a "self-wormhole" not also be possible?
e.g. where opposite points on the event horizon are identified?
...
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What is the gravity and effect of a Black Hole with two connected cones cut from it?
Any question about Black Holes or time travel seems to have some untested theory or incredibly complicated and prohibitively expensive solution, this question is no different.
While the second half ...
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Accelerating thin shell wormholes and closed timelike curves
The classical example of the conversion of a wormhole into a time machine is to consider two wormholes, one stationary and another one accelerating for some period before going back to its original ...
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1answer
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Can black holes make wormhole? [duplicate]
Before you read I want you to know that here I'm a layman and I was just wondering.
It is often visualized, how wormhole works using a curved paper like C, and ...
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Theoretical basis for wormholes [duplicate]
From what little I know about general relativity, energy (and equivalently mass) distorts and curves spacetime due to the Einstien Field Equations. I also know "wormholes" are theoretically solutions ...
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How does a wormhole happen? [duplicate]
Ive been watching a lot of Sci-fi movies and alot of them have to do with worm holes. I know they are real and I dont know how they form. I have been wondering how they form for a while.
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How does time transform in wormholes?
The light from a star 100 light years away takes 100 years to reach Earth so we see remote star as it was 100 years ago.
In the same way, we would see Earth 100 years in the past if we were on the ...
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2answers
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Traversable wormholes: a simple system
From my layman understanding of wormholes, you can only have traversable ones if you take into account the existence of some exotic matter with negative energy relative to the vacuum energy.
If you ...
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“Logical Conclusions” arising from hypothetical wormholes
EDIT
In eternal (time independent) Schwarzschild black hole contains a wormhole called an Einstein-Rosen bridge. But since no real black hole is eternal, real black holes do not contain any ...
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5answers
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Origins of the wormhole and blackhole speculations [closed]
l just read about wormholes and blackholes. They're simply hypothetical structures in the universe predicted by physicists. My question is, what is the basis of their prediction? Who are the people ...
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1answer
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Basic geometry of a wormhole
I have always been fascinated by wormholes. Wherever I read about them, there was this thing that a wormhole sort of connects two points of space. Many books compare wormholes as connecting tubes. My ...
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1answer
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Einstein-Rosen bridge through multiverse? [closed]
The Einstein-Rosen bridge describes a short cut between two point by "connecting" the two destinations in a folded 2-dimensional representation of the three dimensional universe, but if the universe ...
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2answers
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Are time loops real?
I'm new to physics and I was wondering if time loops (like those seen in the movies Groundhog Day or Edge of Tomorrow) possible?
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1answer
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Contradiction to the law of conservation of energy while time travelling [duplicate]
If time travelling backward were possible,(by a wormhole, one opening of which has been kept near a massive body, for instance) wouldn't it contradict the law of conservation of energy, since a ...
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Can we travel forward in time like this?
An object in spacetime warps it and creates like a pit. If the object had such a huge mass and gravity that the pit edges were touching or were anyway very close would it be possible to skip a portion ...
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Wormholes and Closed Time-like Curves
I've been doing a presentation on Wormholes for my Science class, and I've been wondering about the difference of Closed Time-Like Curves and Wormholes, as most articles I read can't truly explain the ...
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Are black and white holes linked? [duplicate]
Theoretically, if black holes are entrances where you are sucked in and you appear somewhere else, do we come out of a white hole? I ask this because a white hole is the opposite of a black hole that ...
