Skip to main content
Physics

Questions tagged [locality]

Ask Question

The tag has no summary.

276 questions
Newest Active Bountied Unanswered
8 votes
6 answers
1k views

In this Veritasium video titled There Is Something Faster Than Light wrong about the interpretation of Bell's Theorem and Bell Test. At 38:30, it states So quantum mechanics is non-local, but it ...
Gunnar's user avatar
  • 495
1 vote
1 answer
288 views

Further to my attempts to understand the Reeh-Schlieder theorem, I want to address another statement that is made, without proof. Once it is shown that the inner product $$ F(x_1,x_2,...,x_n) = \...
flippiefanus's user avatar
  • 17.9k
7 votes
4 answers
1k views

Consider this example I met in my physics class: An infinitely long cylindrical region contains a uniform magnetic field $B$ within it whose magnitude varies with time. Determine the induced electric ...
Harry's user avatar
  • 523
2 votes
1 answer
120 views

From super position principle of electric field, the electric field at a point can be calculate by summation of fields from other charges. I do not see any different from summation of force from ...
Kanokpon Arm's user avatar
  • 189
1 vote
1 answer
150 views

In Why particles only make sense in flat spacetime? user Chiral Anomaly says the Reeh-Schlieder thereom implies that the vacuum state (the lowest-energy state of the global Hamiltonian $H$) cannot be ...
Nairit Sahoo's user avatar
  • 579
6 votes
1 answer
341 views

It is a statement about local relativistic QFT that I hear from Juan's 2015 TASI lecture on Entanglement Entropy. I can vaguely understand this statement, since say usual second-quantization ...
Albert Liu's user avatar
  • 101
3 votes
0 answers
116 views

I am reading this paper on twist fields in 2D integrable QFT: https://arxiv.org/abs/0706.3384 In page 3, the authors offer the following definition of locality in QFT, relativistic as well as ...
Andreas Christophilopoulos's user avatar
  • 914
1 vote
0 answers
231 views

I request someone to please help me in understanding what a field dependent diffeomorphism means? If we claim that a particular change (a change which is dependent on the field) in the metric is ...
SX849's user avatar
  • 445
0 votes
0 answers
135 views

I got two questions on the derivation of the Bell Inequality in Griffiths' "Introduction to Quantum Mechanics" which closely follows Bell's original paper here: https://cds.cern.ch/record/...
Martin Franz's user avatar
  • 41
-1 votes
3 answers
236 views

It is said that the wavelength of light cannot be observed at a fixed point because it is the spatial distribution of the electromagnetic field, but I don't understand it well. Please explain it in an ...
찬소리's user avatar
  • 29
-2 votes
1 answer
220 views

Suppose a universe exists in which only massless particles are present. Say only gravitons and photons. Massless particles (luxons) move on a light-like trajectory and there exist no frames in which ...
Holobrane's user avatar
  • 5
9 votes
11 answers
7k views

I've read somewhat about the matter but can't quite picture it. Is this a property that only applies at the quantum level and not the classical level like us? So far I've seen some rather strange ...
user avatar
1 vote
0 answers
106 views

In a lot of introductions to Landau-Ginzburg theory, which gives the partition function in the form of a functional integral $$\mathcal{Z}[F]=\int \mathcal{D}\phi e^{-\beta F(\phi)}$$ it is said that ...
Lourenco Entrudo's user avatar
  • 1,206
3 votes
1 answer
161 views

While reading Chapter 8 of Khare's textbook "Fractional Statistics And Quantum Theory", I came across this following statement In fact it appears unlikely that one can obtain a simple, ...
Ishan Deo's user avatar
  • 2,993
2 votes
0 answers
75 views

M. Srednicki in his book "QFT" has mentioned in page 4 that " ... we get an infinite number of spatial derivatives acting on $\psi (x,t)$; this imples that equation $$i\hbar\frac{\...
Mahtab's user avatar
  • 964

15 30 50 per page
1
2 3 4 5
…
19