I Alcubierre Drive & Gravitational Waves: Alien Effects?

Grasshopper
Gold Member
Messages
210
Reaction score
115
TL;DR Summary
If alien people used an Alcubierre drive, would it create notable gravitational waves?
Suppose some aliens travel to our solar system after seeing our radio broadcasts using an Alcubierre drive. Would it not create a notable gravitational disturbance? Or does it leave spacetime undisturbed around it?
 
Physics news on Phys.org
As far as I know there are no gravitational waves in an Alcubierre spacetime.
 
Reply
  • Like
Likes vanhees71 and Grasshopper
Thanks
 

Thread 'Euclidean geometry and gravity'

I asked a question here, probably over 15 years ago on entanglement and I appreciated the thoughtful answers I received back then. The intervening years haven't made me any more knowledgeable in physics, so forgive my naïveté ! If a have a piece of paper in an area of high gravity, lets say near a black hole, and I draw a triangle on this paper and 'measure' the angles of the triangle, will they add to 180 degrees? How about if I'm looking at this paper outside of the (reasonable)...
View full post »

Thread 'Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?'

From $$0 = \delta(g^{\alpha\mu}g_{\mu\nu}) = g^{\alpha\mu} \delta g_{\mu\nu} + g_{\mu\nu} \delta g^{\alpha\mu}$$ we have $$g^{\alpha\mu} \delta g_{\mu\nu} = -g_{\mu\nu} \delta g^{\alpha\mu} \,\, . $$ Multiply both sides by ##g_{\alpha\beta}## to get $$\delta g_{\beta\nu} = -g_{\alpha\beta} g_{\mu\nu} \delta g^{\alpha\mu} \qquad(*)$$ (This is Dirac's eq. (26.9) in "GTR".) On the other hand, the variation ##\delta g^{\alpha\mu} = \bar{g}^{\alpha\mu} - g^{\alpha\mu}## should be a tensor...
View full post »

Similar threads

I Can gravitational lensing detect Very small deviations in light propagation?
Replies
8
Views
1K
B Gravitational waves and "warp drive"
Replies
1
Views
2K
B Can Curved Spacetime Enable Faster-Than-Light Travel?
Replies
12
Views
3K
I Gravitational Waves from Vanishing Sun: What Happens?
Replies
4
Views
2K
I Playing music with Gravitational waves
Replies
10
Views
2K
I Alcubierre Warp Drive: 2nd Law of Thermodynamics Impossibility?
Replies
3
Views
2K
I Gravitational wave propagation in GR
Replies
39
Views
3K
Alcubierre metric and gravitational waves
Replies
2
Views
2K
I Gravitational Waves: Questions on Mass & Escape Velocity
Replies
5
Views
2K
Would a Alcubierre drive produce a gravity wave wake?
Replies
12
Views
3K

Hot Threads

Recent Insights

Back
Top