All Questions
Tagged with locality general-relativity
19
questions
5
votes
1
answer
125
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Conserved charge at null infinity associated with Large gauge transformation
I am reading Strominger's lecture notes "Lectures on the infrared structure of gravity and gauge theory" (https://arxiv.org/abs/1703.05448). At some point, following (I guess) the authors of ...
- 3,992
3
votes
0
answers
56
views
Are anyons non local?
Studying anyonic statistics in 2 dimensions, I naturally thought to ask the question of whether anyons are non local, since as we braid one around another, no matter the distance between the two, one ...
- 737
3
votes
2
answers
337
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In Cosmology, what does it mean to be 'local'?
I'm trying to make a point that there is curvature of spacetime from the metric expansion that contributes to the dynamics of a galaxy. This curvature would be in addition to the curvature caused by ...
- 584
9
votes
5
answers
1k
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Does local mean infinitesimally small?
I have studied General Relativity and there is one thing that I have trouble comprehending.
What does local really mean? I will give some examples:
The Hessian
The Hessian is a way to compute the ...
- 1,896
0
votes
3
answers
229
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What is the main reason for the locality of Einstein's equivalence principle?
Einstein's equivalence principle (EEP) states:
"Locally, a free-fall frame in a gravitational field is equivalent to an inertial frame in space in the absence of a gravitational field".
...
- 2,503
4
votes
1
answer
563
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What is a "quasi-local" charge?
Could someone please tell me what is a quasi-local charge? For instance, why are Brown-York charges called quasi-local?
- 700
3
votes
1
answer
649
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Why is there no gauge-invariant local operator in GR?
I have a hard time understanding why the bulk locality is a question. I know some operator which depends on a particular coordinate $x$, $O(x)$, and its correlation function like $ \langle O(x)O(y) \...
- 151
2
votes
0
answers
99
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Locality and relativity - a paradox?
The equations of nature are supposed to exhibit locality in the sense that the action depends on fields and their derivatives. i.e. comparing the values of fields at local points.
But two points on a ...
user84158
3
votes
2
answers
192
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Physics solely in terms of local observables
Practically all of the physics equations I've encountered are written in terms of what might be called "remote observables", such as the distances between objects in Euclidean space or between events ...
- 24.8k
3
votes
1
answer
129
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What is the effect of the locality condition if a „Rindler observer“ hovers close to a black hole?
Consider a „Rindler observer“ hovering close to the event horizon of a black hole, whereby flat spacetime is assumed locally.
Does this observer see the same Unruh radiation like a Rindler observer ...
- 1,589
3
votes
0
answers
322
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Malament theorem in curved spacetime?
Malament's theorem roughly assert that given a very general theory of a point particle, characterized by some operator $P_D$ such that for a region of space $D$ at a given time $t$, $P_D | \Psi \...
- 16.5k
4
votes
1
answer
215
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How local is local in the Hypothesis of Locality?
A while back I asked this question Freely falling frame and the use of special relativity? which I later answered using the Hypothesis of Locality which I used to state that $E=-p_\mu u^\mu$ in any ...
2
votes
1
answer
460
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Why must the Einstein tensor $G$ be linear in the Riemann curvature tensor?
In the classic book by Misner, Wheeler and Thorne, they justify the form of the Einstein tensor, $G$, by the fact that it is the unique tensor which satisfies
$G$ vanishes when spacetime is flat
$...
- 516
4
votes
2
answers
296
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Geometry and integral laws of physics
Reading the English translation of Einstein's seminal paper on GR.
http://einsteinpapers.press.princeton.edu/vol6-trans/90?ajax
This paragraph below on p78 doesn't make much sense to me.
Could you ...
user56963
0
votes
2
answers
63
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Is the influence of gravity greater than light? [duplicate]
As the influence of gravity is infinite throughout the universe.is the influence of its force on a body very far away faster than the speed of light.suppose a star dies...is the influence of its ...
