What is Wormhole: Definition + 113 Threads

A wormhole (or Einstein–Rosen bridge or Einstein–Rosen wormhole) is a speculative structure linking disparate points in spacetime, and is based on a special solution of the Einstein field equations.
A wormhole can be visualized as a tunnel with two ends at separate points in spacetime (i.e., different locations, different points in time, or both).
Wormholes are consistent with the general theory of relativity by Einstein, but whether wormholes actually exist remains to be seen. Many scientists postulate that wormholes are merely projections of a fourth spatial dimension, analogous to how a two-dimensional (2D) being could experience only part of a three-dimensional (3D) object.Theoretically, a wormhole might connect extremely long distances such as a billion light years, or short distances such as a few meters, or different points in time, or even different universes.

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1. B Space/time fabric analogy

Common these days is explaining worm holes and the space and time correlation as a fabric which could allow for the fabric to be manipulated in a way that would allow for time travel. The way I’ve understood the concept is that you could fold the fabric to touch two different areas together...
2. I Would moving the mouths of a wormhole affect the internal distance?

Lets say I formed a traversible wormhole with one mouth on each end of my garage. If I picked up one of the ends and drove it to the park, would the distance inside the wormhole increase or otherwise be effected as well? This is my first post on physics forums - Hi everybody...
3. A Where exactly is the wormhole in the Kruskal-Szekeres diagram?

Dear all, recently I was brushing up my knowledge of black holes with (among others) Zee's "Einstein gravity in a Nutshell" and encountered the analytical continuation of the Schwarzschild black hole in the famous Kruskal-Szekeres coordinates (Zee: chapter VII.2). The corresponding diagram can...
4. Physicists Create ‘the Smallest, Crummiest Wormhole You Can Imagine'

https://www.nytimes.com/2022/11/30/science/physics-wormhole-quantum-computer.html My question is on the scale of 0 to 100 of completely misleading hype (zero) vs. good scientific reporting (100), where does this article stand? Someone can turn this into a formal poll if desired.
5. I Is Connes' Model of the Higgs Field a Wormhole?

As this week the great topic is the Einstein-Rosen bridge and duals of it, I wonder what happened with the interpretation of Connes NCG model as two sheets of spacetime whose separation is measured by the higgs field. How is it different of a ER bridge?
6. B How many nuclear weapons are needed to make a wormhole?

Hi guys! After many years of lurking quietly I finally have a question that I'd like to know, please. I'd like to know how much energy is needed to make a wormhole in terms of our current nuclear weapons, or how much mass is needed to turn into pure energy, maybe via antimatter annihilation...
7. I Potential Energy in Wormholes: Charged Particles & Electric Fields

Suppose a charged particle is in an electric field and feels an electric potential. Then the particle travels through a wormhole to another electric field and the particle feels a different electric potential. The potential energy of the particle will change. So what will that part of potential...
8. B Creating a Wormhole: Process & Theory

Black hole is real in nature and we know what is reason of it. If energy concentrate in sphere with radius which less gravitational radius then second cosmic velocity is speed of light and create black hole. We know process which can create these. If we know it we can realize quantum black hole...
9. Alien spaceship wormhole gravitational waves detector

Recently viewed video about wormholes that required negative energy to create it. Suppose hypothetical aliens have discovered this technology. Spaceship enters in first point and exit at second. To prevent spaceship destruction they might have technology to smooth gravitational waves on exit...
10. E

I Why do the two mouths of a wormhole have opposite charges?

It's about problem 106 and 107 in Gauge Fields, Knots & Gravity. There's a wormhole of topology ##\mathbf{R} \times S^2## on which has been defined a spherical metric ##g = \mathrm{d}r^2 + f(r)^2 (\mathrm{d} \phi^2 + \sin^2{\phi} \mathrm{d} \theta^2)## as well as a 1-form ##E =...
11. A Doubt about Energy Condition in Wormhole: Integral Along Null Geodesic

I am now reading this paperhttps://arxiv.org/pdf/gr-qc/0405103.pdf, which is related to the energy condition in wormhole. Nevertheless, I got a problem in Eq.(6), which derives from so-called ANEC in Eq.(2): $$\int^{\lambda2}_{\lambda1}T_{ij}k^{i}k^{j}d\lambda$$ And I apply the worm hole space...
12. A Time Measurement in MT Traversable Wormholes - Help Needed

I am reading this article now :http://www.cmp.caltech.edu/refael/league/thorne-morris.pdf. And i am a little bit confused about the Eq.(38a)and Eq.(38b), which means the time measured by traverller and people in the sataion, and I just think the time measured by traveller should be his proper...
13. B 100sqft wormhole from sea level to outer space?

Hypothetical scenario and I'm trying to understand the velocity of the air as it tries to equalize with a large vacuum. I presume this model isn't very much different from an initial loss of 1 atmosphere pressure in space via some puncture. I'm mainly concerned with the immediate wind speeds and...
14. B A wormhole collides with a black hole -- what would happen?

A wormhole collides with a black hole------------what would happen?
15. I Why Does Wormhole Travel Take Longer Than a 'Regular' Path?

Hi! I've just read some articles about the fact that wormhole travel would be slower then taking a "regular space time path" between two hypothetical black holes. This stunned me as I always thought the Einstein - Rosen Bridge would be connecting two distant points in space in a more direct...
16. M

What would a wormhole look like from the inside?

I'm working on the sequel to 'Guardian', and have my (somewhat) hero traversing a wormhole. Which got me wondering, what does it look like from the inside? Movies often depict flashing lights or a tunnel of some kind. I suspect Interstellar might be the standout for accuracy, but that's only a...
17. Ship & Wormhole: Exploring Physics Homework

Hello everybody, I am sorry, but I need your help with my physics homework. I will be very happy if somebody could help me. 1. Homework Statement Task: The ship passed through the wormhole. The “new” temperature of cosmic microwave background is T = 0,3 K. The curvature of the universe is...
18. I ER=EPR baby steps: causation or not?

The questions concern the extension of the holographic principle to the identification of a wormhole between two black holes with negative cosmological constant and an entangled pair on its boundary, included in the conjecture known as EPR=ER ( Maldacena, Susskind). I refer to...
19. Why the explanation of wormholes using paper grinds my gears

Hey, This is more of a discussion rather than a question. A lot of movies (e.g. interstellar, Event Horizon), have a go at trying to explain how the Warp/Alcubierre drive could work, and usually, the argument goes like this: They take a point A and a point B, connect them with a line on the...
20. B Effects on Area Outside Wormhole: Radiation, Magnetic Field, Anomalies

Supposing it were possible to open a stable wormhole close to a planets surface, what could the effects to the immediate area outside the mouth of the wormhole be? Such as radiation, atmospheric anomalies, changes to the planets magnetic field, etc. Thank you for any assistance
21. I Exploring the Possibility of Wormhole Creation: A Scientific Perspective

Hi, if i understood correctly from pop-science literature, there is theoretical possibility of formation of wormholes like in this picture: https://en.wikipedia.org/wiki/File:Wormhole-demo.png bud you need some exotic particles (i think it means negative energy?). Now what i really don't...
22. A Can Wormholes Be Integrated into the Standard Model of Physics?

Apparently the Internet hasn't noticed this paper yet: http://arxiv.org/abs/1807.04726 Traversable wormholes in four dimensions Juan Maldacena, Alexey Milekhin, Fedor Popov (Submitted on 12 Jul 2018) We present a wormhole solution in four dimensions. It is a solution of an Einstein Maxwell...
23. How to Find a Closed Trajectory for a Wormhole Metric?

Homework Statement I have a metric for wormhole. Now if I want to find the closed trajectory for this metric how will I proceed from here? Help me with detailed maths if possible. Homework EquationsThe Attempt at a Solution
24. Writing: Input Wanted How can a wormhole be relocated and what would happen to objects near it?

Hi I am writing a short story about wormholes being used as a plot device. I know wormholes have no stable solutions unless you put some form of exotic matter or other means of stabilizing the geometry. I assume that I have a wormhole of any size which is stable when other matter comes near it...
25. I Rotating Black Hole w/ Ring: Spacetime Effects

What would spacetime look like near a black hole that was rotating at its extremal speed and had a ring of matter orbiting it at ultra-relativistic speeds (just outside the photon sphere), such that the ring was orbiting in the same direction as the black hole’s rotation? The ring would add to...
26. I The metrics to describe a wormhole

Lets consider some kind of metrics: $$ds^2 = dt^2 - \frac{dr^2}{1-\frac{2M}{r}} - r^2(d\theta^2 + \sin^2\theta d\phi^2).$$ here ##r = l/2\pi## is the radial coordinte like in Schwarzschild metrics. As far as I know, this metrics is describe the whormhole. Lets put...
27. I Exploring the Possibility of Creating Wormholes and Switching Universes

Is there a possibility that we create a wormhole sometime and switch between universes? First of all what is required to make a wormhole? What will happen if we made a wormhole? What proves that there are many universes and that we can switch between them??
28. B Exiting Wormhole Prematurely: Where Does Your Ship End Up?

Suppose there was a wormhole connecting two points in space A and B. Your ship enters at A. Half way through journey inside the tunnel, your ship suddenly makes a sharp right turn and penetrates the wall of the tunnel and leaves the wormhole -failing to complete the full journey to point B Where...
29. I Can Black Holes Connect Lovers? Exploring Einstein-Rosen Bridges

I saw a video of a talk by Susskind discussing his ER = EPR idea. This post isn't actually about that talk, except that it got me thinking about wormholes. Without exotic means, I understand that it is basically impossible to have a traversible wormhole connecting two distant points in space...
30. M

Acceleration change during teleportation

Let's assume that it is possible to teleport safely (in one piece, with same body structure) to different galaxy using something as wormhole. Then what would be acceleration that participating in such travel human experience? As I know solar system travels at 230 km/s around the galactic...
31. I Radiation passing through Planck-scale wormholes

This is something that has really been bugging me lately. There was a study from over twenty years ago that proposed that electromagnetic radiation might have been able to pass from one end of the universe to another in the early universe, furnishing an explanation for the homogeneity of the...
32. I Dragging a wormhole into a black hole

Assuming a wormhole exists, what would happen if one took one end of the wormhole into a black hole. Could they enter the wormhole and leave the black hole? What would be the result if they did?
33. I Understanding Wormhole Solutions to the Einstein Field Equations

I have to do a project on wormholes as solutions to the EFE, but I'm only and undergrad and have not yet taken any GR classes. I found a paper by Michael Morris and Kip Thorne with a derivation of a simple wormhole (many assumptions), but because of my lack of experience I can't tell what the...
34. I Faster Than Light Travel: Wormhole Questions

When a wormhole opens, if each side of space is equally stretched to meet each other. Then wouldn't it be possible to only go halfway through the wormhole, close it and allow the opposite side of space you're trying to reach, "normalize" and wouldn't the space on the side you've traveled to that...
35. A When a mass enters or leaves a wormhole mouth is momentum transferred

Was that title possibly truncated? *When a mass enters or leaves a wormhole mouth is momentum transferred?* Also, does mass/energy passing through an event horizon generally or a black hole's event horizon transfer momentum? That's three questions, but the title question is what interests me here.
36. B In what year was wormhole collapse discovered?

In what year was it first discovered that wormholes are non-traversable because the introduction of infalling matter caused the throat to collapse? Who discovered this?
37. I How to visualise an instanton?

Not sure whether this should be posted under GR, QM, Beyond the standard model, or Topology and analysis. I understand GR best so am posting here. I'm having trouble visualising the "instanton". My limited understanding is that the instanton appears both in GR and QM, and has a role in the...
38. I Morris-Thorne Wormhole Metric Terms

Here is the Morris-Thorne Wormhole line element: ds2 = - c2dt2 + dl2 + (b2 + l2)(dθ2 + sin2(θ)d∅2) Now my main question here (even though I've asked this before, but never quite understood) is: What exactly is l? I know that b is the radius of the throat of the wormhole. I know that the rest...
39. The Internal Consistency of Collapsing Realities

Currently I am working on a manga/comic of mine which imvolves science, especially stuff related to quantum mechanics. The theme of my manga is based on the 'collapsing of realities'...i.e, realities from different timescales would collapse at one place and try to exist at once, which would...
40. I Definition of a Lorentzian Wormhole

I was reading into traversable wormholes when I came across this definition from Matt Visser; 'If aMinkowski spacetimecontains a compact region Ω, and if the topology of Ω is of the form Ω ~ R × Σ, where Σ is a three-manifold of the nontrivial topology, whose boundary has topology of the form ∂Σ...
41. Do White Holes Violate 2nd Law of Thermodynamics?

I have heard (read) much debate over the fundamental problems with white holes, mainly that they violate Thermodynamics by increasing entropy. However, I have also read that a black hole bends space-time enough to "connect" somewhere else as an Einstein-Rosen Bridge. So if the exact same event...
42. Wormhole Metric: Solving Difficult Differential Equations

I'm doing a thesis about wormhole and I would like to put a part in which I conjecture that a shuttle(precisely the Endurance from Interstellar) goes to Kepler 422-b using a Thorne-Miller wormhole. The problem is that I don't know hot to solve a difficult differential equations. Thank you very...
43. Does quantum entanglement in fact equal a wormhole?

So I came across this paper claiming that quantum entanglement was an as yet not understood Einstein Rosen-Bridge: http://arxiv.org/pdf/1306.0533v2.pdf I have two questions pertaining to this: 1. Does the math on this paper actually check out and is this possible? 2. Since this paper...
44. B Can a Black hole also be a wormhole?

Can a Black hole also be a wormhole ?? is it possible
45. A If black holes never exceed a certain mass....

Does this imply that we are looking at wormholes?
46. About the use of wormhole in the interstellar movie

I am new to this forum and don't quite know if these types of questions are appreciated here or not but i have a question about the use of wormhole in the interstellar movie. We saw that they used the wormhole to travel to a distant place on the universe. When the main characters went to the...
47. A Addresses of Parallel Universes

Hi there! Alright, so let me start off by saying I'm a biochemist by trade, but have an extreme (and possibly unhealthy) interest in the more bizarre aspects of modern physics. Admittedly, I don't understand the mathematical formalisms associated with the theories I know of, so bear with me if...
48. Wormholes, Gravity & Interaction: Can a Star Pull a Planet?

Would objects interact via gravity through the wormhole? Let's say there's a star outside one wormhole, and a planet outside the other, would the star pull the planet through the wormhole?
49. Traversable wormhole without negative energy (paper)

I'd like to know your views. Is it too good to be true? Or is there any obvious blunder?http://arxiv.org/abs/1509.07854 NUT wormholes Gérard Clément, Dmitri Gal'tsov, Mourad Guenouche (Submitted on 25 Sep 2015) We show that supercritically charged black holes with NUT provide a new setting for...
50. Is this magnetic wormhole really a wormhole?

A new article http://www.nature.com/articles/srep12488 says a trio of experimenters have created the first artificial wormhole for magnetic fields. My reading of it sounds more like a metallic shield of a magnetic field. Is anyone else left with the feeling that the claims have been overstated...