Manipulating Space-Time with Lasers

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SUMMARY

This discussion focuses on manipulating space-time using powerful laser beams, specifically referencing axisymmetric pp-wave spacetimes and the Bonnor beam solution in General Relativity (GR). Participants explore the concept of how rotating objects, such as a metal disk, affect the curvature of space-time through frame-dragging effects. Key resources include Wikipedia articles on Bonnor beams and frame-dragging, which provide foundational knowledge on these advanced topics.

PREREQUISITES
  • Understanding of General Relativity (GR) principles
  • Familiarity with pp-wave spacetimes
  • Knowledge of frame-dragging effects
  • Basic concepts of rotating coordinates in physics
NEXT STEPS
  • Research the Bonnor beam solution in General Relativity
  • Study the effects of frame-dragging on space-time curvature
  • Explore advanced topics in axisymmetric pp-wave spacetimes
  • Investigate the implications of rotating coordinates in gravitational physics
USEFUL FOR

Physicists, astrophysicists, and students of General Relativity interested in the manipulation of space-time and the effects of rotating masses on curvature.

jaiii
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How to change the curvature of space-time around a very powerful laser beam?
 
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Look up pp-wave spacetimes, particularly the axisymmetric pp-wave spacetimes.
 
Spinning disk

Thank you for your reply but I have another question
How lame space time around a rotating metal disk?

Thank you.
 


Huh? What is a lame spacetime?
 


"lame" I mean curvature of spacetime.

I am sorry but this text translate Google from Slovak languige.
 
Hi jaiii ! :smile:

Any rotating object "drags" spacetime around with it …

see http://en.wikipedia.org/wiki/Frame-dragging" :wink:

btw, "lame" means unable to walk properly ("he is lame", "he has a lame leg" "lame-duck president"), and also is used figuratively to mean something that doesn't work properly ("a lame excuse") :smile:​
 
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In addition to the information about how a rotating mass affects the curvature of spacetime you may want to read about how using rotating coordinates affects things in the absence of a rotating mass:

http://www.phys.uu.nl/igg/dieks/rotation.pdf
 
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