Questions tagged [wormholes]

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Would Quantum foam wormholes move at relativistic speeds?

I have heard theories that fluctuations in the quantum foam create subatomic wormholes. If this is correct, would subatomic wormholes have so little mass that they would move at relativistic speeds, ...
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How (if) can we connect a 2D "throat" piece of a wormhole to two hyperbolic 2D manifolds?

This question wad closed on the mathematics site, as it lacked clarity. So I try my luck here. My question is cosmology-inspired. Imagine two 2D hyperbolic manifolds. I connect them by a manifold like ...
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What would happen if the two mouths of a wormhole are receding away from each other faster than light?

If wormholes could form naturally, and point A and point B were in galaxies receding from each other faster than light, what would happen to something going from one end to the other? Physicist Kip ...
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How long would it take to build a wormhole? [closed]

If it were possible to build wormholes, would the process of building them also be faster than light as seen outside the wormhole, or would it take at least as much time as it would light to traverse ...
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Worm hole travel without time travel? [duplicate]

If the two endpoints of a worm hole have to remain stationary does travelling and communicating through them still facilitate time travel? For example If I travel through a worm hole from Earth to 20 ...
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Does discovery of graviton disprove wormhole since latter is applicable in GR only?

I know graviton is only a hypothetical particle invented probably to serve as a placeholder in standard model, but suppose one day we discovered graviton, does this disprove the existence of wormhole ...
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Could Planck scale wormholes be a solution for non-locality?

When two entangled particles are separated, an observation made on one particle seems to be able to act at a distance to determine the state of the other particle. Is it possible, or has anyone in ...
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Spacetime distortion and wormholes

Consider the fact that the curvature of spacetime and its relation to matter is given by the EFEs $$R_{\mu\nu}-\frac{1}{2}Rg_{\mu\nu}=\frac{8\pi G}{c^4} T_{\mu\nu}.$$ It is well known that the left ...
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Wheeler-Regge analysis of $R \neq 0$ metric

I am trying to do a Wheeler-Regge analysis of a Morris-Thorne wormhole, but unfortunately, the Morris-Thorne wormhole is not Ricci-flat i.e. $R \neq 0$ where $R$ is the Ricci scalar, therefore, I am ...
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Vanishing throat of Morris-Thorne wormhole

Consider the Morris-Thorne wormhole given by (http://www.pas.rochester.edu/~tim/introframe/AmJPhysBlackHoles.pdf , Box 2) $$ds^2 = -dt^2+dl^2+(l^2+b_0^2)(d\theta^2+\sin^2\theta d\phi^2)$$ where $b_0$ ...
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Black Hole limit from Morris-Thorne wormhole

I have to show that Morris-Thorne wormhole given by the metric $$ds^2=-e^{2 \Phi}dt^2+\frac{1}{1-\frac{b}{r}}dr+r^2(d \theta^2+\sin^2 \theta \ d \varphi^2)$$ has a black hole limit (or maybe flat or ...
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How close are we to making a wormhole? [closed]

Is humanity nearing the ability to construct a stable wormhole? It's been something that was depicted for a while in various science-fiction shows; but are we getting close? Do quantum computers ...
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Where is the wormhole in a Schwarzschild geometry?

I am new on wormholes and in my understanding, an interpretation of a wormhole connecting two "universes" can be obtained by doing coordinate transformations on the Schwarzschild metric. I ...
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Crossing a Kerr wormhole

You cannot cross an Einstein Rosen Bridge because it needs faster than light speed to cross it. But the same is not true for a Kerr wormhole, it lies beyond the Cauchy Horizon and you do not need FTL ...
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Would you feel the gravity of a black hole through a wormhole?

So, hypothetically, if we were to "accidently" open a Einstein-Rosen bridge and the other side of the wormhole opened with in the gravity well of a blackhole. Would the gravity, and effects ...
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Black Hole Singularity Other Universe

It is thought that there is another universe beyond the singularities of black holes. Is it because width of the light cones become zero at the singularity, meaning that you can cross infinite ...
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Wormhole other end [duplicate]

How do we know what lies at the other end of a wormhole (another universe, a place 50 miles away, a place very far away) from its metric equation? Why is it said that there lies another universe at ...
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Other Side of an Einstein Rosen Bridge

We get an ERB when we replace $u^2$ by $r - 2M$ in Schwartzchild Metric, therefore the metric becomes symmetric along the horizon $(r = 2M)$. Why should it mean that crossing the horizon leads you to ...
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FTL speed to cross an Einstein Rosen Bridge

We cannot cross an ERB because it needs faster than light speed, which is usually explained by showing a Kruskal diagram - why explains the situation but is not very intuitive. We also know that, the ...
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Crossing an Einstein Rosen Bridge

In order to derive ERB from Schwartzchild Metric, we replace $(r - 2M)$ by $u^2$ - which means after you cross the horizon the metric becomes the same as it was before the horizon. That means you ...
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What happens when a wormhole mouth moves over a smaller object?

This is really lots of questions in one, but I'll start by expanding on the title. Say that we have an infinite, euclidian universe (4d spacetime) with nothing in it but a single object (1m diameter ...
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How would colliding photons behave THROUGH a wormhole? not just colliding photons elsewhere [duplicate]

What will happen to photons when they are colliding to each other while travels through a wormhole ? keyword here is WHILE THROUGH WORMHOLE, not just simple collision of photons. Is it correct to ...
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Is it scientifically possible that “DNA can open wormholes” as suggested by an article in a mainstream & reputed journal?

I am attaching the links of two articles: Mathematic model for vibration behaviour analysis of DNA DNA Phantom Effect In the introduction section of the first article it mentions that Poponin tried ...
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How does one calculate the tidal force in the throat of a wormhole?

If you were to attempt to open a wormhole from Earth to Alpha Centauri (4.37 LY), and its throat were to be a radius of 1m, while its mouth were to be 1.5m radius, how many newtons of force would be ...
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2 votes
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Deriving Einstein-Rosen Bridge

I know that an einstein rosen bridge is derived by a coordinate transformation on the schwarzschild metric, but I can't find much on it online, could someone please show how to change the metric into ...
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Is a wormhole detour in spacetime really shorter in distance or time than a straight line?

In this question I am coming from a mathematical perspective. Apologies if this question has already been answered in layman's terms. But here I am trying to understand the issues in mathematical ...
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Visualizing wormholes without embedding spacetime

Common visualization Wormholes are often "explained" by a visualization like this where spacetime is reduced to two spatial dimensions: (Source) The problem with this visualization Now I ...
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Can the mouths of wormholes migrate over time?

Let's say that we made a wormhole time machine where one mouth was held in my backyard right now in the present time, and the other mouth travelled into the future for 100 years. What happens to the ...
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Does kinetic energy qualify as negative energy in the wormhole of Kip Thorne and Mike Morris?

Referring to Lagrangian methods if potential energy of gravity is considered as positive energy, then kinetic energy should be considered negative. Recent publications on frame dragging could suggest ...
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Trying to solve Einstein's Field equation , i.e Finding each components of the equation

Does knowing the $FRW$ metric equation is required first so as to solve Einstein's field equation ? $\Rightarrow$ First FRW, then the christoffel symbols, then the riemann tensor, then the ricci ...
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4 votes
2 answers
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Is spacetime an actual tangible "fabric of the universe", or a mathematical construct? [duplicate]

There's a compelling theory put forth (or at least reiterated) I believe by Feynman(?) (Edit: Sorry it was Penrose) , that, assuming all subatomic particles eventually decay, the resulting empty ...
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What would happen to matter within a wormhole that closes?

We're not sure if wormholes can be held open, but we know they can exist, at least on quantum levels. I just watched a video where a physicist mentions that even if we could hold one open, sending ...
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Lower limit to the distance between two mouths of a wormhole?

This is more like a conceptual question. Wormholes are tunnels connecting two different parts of the same universe or connecting two parts in different universes. Taking the former one as an example; ...
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Considering the negative energy density in the Casimir effect and general relativity worm holes, are these experiments feasible?

The question came after I answered the question here, and reading the link provided where negative mass is needed to create wormholes, Microlensing by natural wormholes: theory and simulations We ...
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Do wormholes really exist?

we can see most of the science fiction stories, movies, and television serials use the concept of wormholes. Do wormholes really exist in this universe? I'm curious about it. And also, what are the ...
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Wormholes on Kruskal-Szekeres coordinates

Kruskal-Szekeres coordinates in the diagram are $$v=\Big(\frac{r}{2M}-1\Big)^{1/2}e^{r/4M}\sinh\Big(\frac{t}{4M}\Big)$$ $$u=\Big(\frac{r}{2M}-1\Big)^{1/2}e^{r/4M}\cosh\Big(\frac{t}{4M}\Big)$$ Region-$\...
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Mass coming through a wormhole looks like monopole radiation?

Suppose we have a spacetime containing a traversible two-sheet wormhole. In other words, there are two otherwise independent asymptotically flat spacetimes glued together at the wormhole. The ADM mass ...
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How can I "match" energy-momentum tensors in Einstein Field Equations?

I) CONTEXT: When we study exotic solutions of Einstein Field Equations (EFE), such as Traversable Wormholes, the elementary modus operandi to extract some analysis is to deal with EFE in the following ...
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Wormhole question

first time of posting with very little knowledge of physics, but I am also very curious and eager to understand. So I was watching interstellar (Christopher Nolan Film)the other day (for the 100th ...
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Entanglement and the relativity of simultaneity: an experiment [duplicate]

Setting of the experiment: Triplets Alice, Bob, and Carla have plenty of entangled electrons when they depart from Earth. Alice stays behind, Bob goes to Zeta Reticuli, and Carla goes to Andromeda. ...
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Does Coordinate time make sense in a universe with wormholes?

Let us say that you have a spacetime with wormholes, and a coordinate system. The two ends are created at almost the same point in spacetime. Then the one end is taken far away and time dilated; (note:...
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Do wormholes really allow us to travel back in time?

Theories surrounding wormhole based time travel are annoying me tonight... So the way time works is relative, right? The closer you are to the frame of reference, the faster time moves. So, if we use ...
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How accurate are the wormhole visualizations in Interstellar?

I'm watching Interstellar and as a huge gravity geek I'm loving it. I have some doubts about the accuracy of the wormhole visualizations, but I want to double check because I heard they had physicists ...
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Am I seeing a particle orbiting a Morris-Thorne Wormhole?

I tried to calculate the time-like geodesics of the Morris-Thorne Wormhole $[1]$, $[2]$, $[3]$ for redshift function $\Phi(r) = 0$ and $b(r) = \sqrt{r_{0} r}$. But I don't know for sure if all the ...
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Am I seeing a particle orbiting a Morris-Thorne Wormhole? [duplicate]

I tried to calculate the time-like geodesics of the Morris-Thorne Wormhole $[1]$, $[2]$, $[3]$ for redshift function $\Phi(r) = 0$ and $b(r) = \sqrt{r_{0} r}$. But I don't know for sure if all the ...
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Doubt on Newman-Janis algorithm for a traversable Wormhole

Recently in a paper $[1]$ the researchers presented a rotating traversable wormhole solution using the famous Newman-Janis Algorithm $[2]$. But something is anoying me. In $[1]$ they presented the ...
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Theoretically, how could a wormhole be made? [duplicate]

Concentrating a lot of matter in one place will make a black hole, not a wormhole. A wormhole would change the topology of spacetime. Does General Relativity allow this? I know there are wormhole ...
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Are wormholes evidence for traversal of a higher dimension?

Warning, pop science coming.. please correct what I’m getting wrong. Einstein’s equations of relativity showed the potential for existence of wormholes that can connect different points in space time....
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Einstein-Rosen bridge

The paper in question is Ref. 1. This is a traversable Einstein-Rosen bridge. However, this paper calculates that an in-falling observer will cross the throat of the wormhole in finite proper time but ...
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Novikov self-consistency principle and probabilities?

According to the Novikov's self consistency principle (also proposed by other authors such as Kip S Thorne) 1 2, if an event exists that would cause a paradox or any "change" to the past, ...
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