All Questions
Tagged with locality definition
17
questions
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Definition of “quasi-locality” in Wilsonian RG scheme
I’m studying about the holographic RG with this paper.
In that paper they say Wilsonian action expects quasi locality, but I’m not sure what “quasi-locality" exactly means.
If quasi-locality ...
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1
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$SO(3,1)$ is locally $SU(2)\times SU(2)$, what does *locally* mean here?
I am learning Lie group and Lie algebra. I saw in a YouTube video "Supersymmetry lecture 02" from OpenCourseWare (OCW) at University of Cambridge at 11:17 that
$SO(3,1)$ is locally $SU(2) \...
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Newton's second law - local laws and non-local laws
What are local laws? I was reading this line in a book...
Newtons second law is a local law. This means that it applies to a particle at a particular instant without taking into consideration any ...
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Conformal Field Theory and Vertex Operator Algebra
I am trying to understand CFT from the viewpoint of both math(in particular using VOA) and physics. Now, in Math, we use the VOA to make sense of fields corresponding to certain states. We define for ...
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What does local gauge invariance have to do with locality?
This concept is just being introduced to me in my QFT course, and my instructor mentioned that if a scalar field $\phi$ has $U(1)$ symmetry, then you can make a suitable gauge transformation $\phi \...
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Meaning of 'Local' density in Liouville's theorem
Liouville's theorem is commonly stated as
$$\frac{d\rho}{dt} = \frac{\partial{\rho}}{\partial{t}} + [\rho, H]$$
Where, $H$ is Hamiltonian of the system, $\rho$ is the density, $[...]$ is the usual ...
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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 ...
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What does it mean that gravity is '"local"? [closed]
What is "local" defined to be? Why don't larger systems affect smaller ones? ie. Don't we need to consider the gravitational pull from all other objects in the universe? Is this "...
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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
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What exactly means "local"? How local (and memoryless) is "local"?
Local and memoryless are easily defined in quantized space and time:
Local: What happens from one time step to the next in one "cell" of quantized space is only influenced by the state of ...
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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
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What is locality?
In QFT and statistical mechanics, one is usually interested in studying integrals of the form:
$$Z(\phi) =\int d\mu_{C}(\phi')e^{-V(\phi+\phi')}$$
where $\mu_{C}$ is Gaussian measure with mean zero ...
- 585
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2
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712
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Mathematical Definition of Locality
What is the mathematically precise definition of principle of locality in physics for a continuous space-time in the sense that an object is only directly influenced by its immediate surroundings?
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What is meant by a local Lagrangian density?
What is meant by a local Lagrangian density?
How will a non-local Lagrangian look like?
What is the problem that we do not consider such Lagrangian densities?
- 26.8k
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Definition of Local Function
Now a days I am studying Srednicki's QFT book. In its third chapter it is written that
Any local function of φ(x) is a Lorentz scalar, [...] .
Now my question is: What is a local function?
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