Doesn't every particle distort space-time?

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Discussion Overview

The discussion revolves around whether every particle, including massless particles like photons, distorts space-time due to their energy. Participants explore the implications of particle interactions and the nature of curvature in space-time as described by general relativity.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants suggest that since every particle delivers energy upon interaction, it should distort space-time.
  • Others argue that photons, being massless, may have an average distortion of zero, questioning how their energy contributes to space-time curvature.
  • One participant posits that a proton can only distort space-time indirectly by transferring energy to another particle, which then causes the distortion.
  • Another viewpoint asserts that photons theoretically cause curvature in space-time, implying that all particles contribute to this curvature in theory.
  • A participant raises the idea that if a photon causes localized distortion, it must balance this with opposite distortions elsewhere, leading to an average curvature of zero.
  • There is a discussion about the relationship between the type of curvature produced by bosons and fermions and its implications for understanding supersymmetry.
  • One participant emphasizes that the curvature associated with photons is negligible but non-zero, and questions the concept of average curvature in non-Euclidean spaces.
  • Another participant seeks to differentiate the space-time distortions linked to bosons versus fermions, suggesting that all particles, as manifestations of energy, must have associated distortions.
  • A later reply discusses the potential for reformulating fields in terms of space-time distortions, referencing string theory and the energy density variations along strings.

Areas of Agreement / Disagreement

Participants express differing views on the nature and significance of space-time distortion caused by various particles. No consensus is reached regarding the implications of mass and energy on curvature, nor on the average effects of these distortions.

Contextual Notes

Some participants note the limitations of discussing average curvature in non-Euclidean spaces and the dependence of curvature on inertial mass, which may not apply uniformly across different particle types.

Mike2
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Since every particle from photon to proton delivers energy when it interacts, then doesn't this energy distort space-time by its energy?
 
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Photons don't have mass, so wouldn't it be that have an average distortion of zero?
 
The only way a proton could distort spacetime would be indirectly. It would have to hit another particle, giving it energy, and then that particle would distort spacetime (more than it had before)
 
Photons do (theoretically)cause curvature in spacetime, so every particle does cause curvature in spacetime, in theory at least.
 
jcsd said:
Photons do (theoretically)cause curvature in spacetime, so every particle does cause curvature in spacetime, in theory at least.
Would we say that at any instant the net total curvature of a boson/photon would have to average to zero as seen from a distance so that it is not considered to have mass? Would this mean if the photon shrinked space at some points, then it would have to stretch space at other points so that the average is zero? Or does energy only curve space-time in one direction of more curvature?

Is there a clue between the type of curvature produced by bosons and fermions that might lead to a better understanding of supersymmetry?

Thanks.
 
No, the main problem I see is for a photon your dealing with a curvature so small as to be insignificant, but by general relstavity non-zero. I really don't think you can say that a space has an average curvature of zero, unless that space is Euclidian (i.e. has a curvature of zero), which certainly is not the case in GR for a space containing anything with inertial mass.

In general relativity the curvature is only dependnet on one thing: the inertial mass of the particle so it matters not one iota whether the particle is a fermion or a boson.
 
jcsd said:
No, the main problem I see is for a photon your dealing with a curvature so small as to be insignificant, but by general relstavity non-zero. I really don't think you can say that a space has an average curvature of zero, unless that space is Euclidian (i.e. has a curvature of zero), which certainly is not the case in GR for a space containing anything with inertial mass.

In general relativity the curvature is only dependnet on one thing: the inertial mass of the particle so it matters not one iota whether the particle is a fermion or a boson.
What is the "inertial mass" of a photon/boson?

I'm trying to distinguish the space-time distortions associated with bosons as opposed to fermions. We've already admitted that there must be a distortion associated with bosons since they have energy that they carry from one place to another. If all forms of particles have space-time distortions associated with them because they all are various manifestations of energy, then perhaps the various fields can be reformulated in terms of these kinds of space-time distortions. Even in string theory, the strings go through various modes of vibration. I believe this means that the waves that travel on the string represent peaks and valleys of higher and lower energy density along the string and therefore waves consisting of higher and lower space-time distortions associated with them. We are trying to unify the other force fields with gravity, aren't we? And gravity is represented as space-time distortions. So I think this is a natural question to ask.
 

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