864 reputation
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age 24
visits member for 2 years, 6 months
seen Jun 22 at 17:18

NTS


Jun
20
comment Human max speed in open space
@Rodolphe What then? I thought we were talking Newtonian. But if you see curved spacetime, then it's because there's an interaction with something producing that curvature.
Jun
20
answered Human max speed in open space
Jun
16
comment Why is the Baryon Acoustic Oscillations (BAO) calculated like this?
@ChrisWhite I know, I was really surprised. I rephrased the question to make it independent of that wikipedia page.
Jun
16
revised Why is the Baryon Acoustic Oscillations (BAO) calculated like this?
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Jun
15
asked Why is the Baryon Acoustic Oscillations (BAO) calculated like this?
Jun
4
revised Can we assume black hole is just two big stars revolving around each other?
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Jun
4
revised Can we assume black hole is just two big stars revolving around each other?
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Jun
4
revised Can we assume black hole is just two big stars revolving around each other?
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Jun
4
comment Can we assume black hole is just two big stars revolving around each other?
Downvote why? Nothing I said was wrong, it was a completion to the answers.
Jun
4
comment Turning points of particle
@RafaFafa You're welcome!
Jun
4
answered Turning points of particle
Jun
4
answered Can we assume black hole is just two big stars revolving around each other?
May
15
comment What is the length dimension in critical phenomena?
Hm, I had $\xi$ defined as $$\xi^2=\frac{\int_0^\infty r^2G(r)}{\int_0^\infty G(r)}$$ But anyway, I know the expression of the correlation function in the three regimes, I just fail to see why I should expect values that don't depend on the size of the system for dimensionless variables. Thank you for answering
May
15
comment What is the length dimension in critical phenomena?
@MengCheng I think it's the word length that confused me, sorry. For example the Binder cumulant as defined in the previous question ($\langle m^4\rangle/\langle m^2\rangle^2$) is dimensionless, why should it be better that $\xi/L$ to find the critical point?
May
15
comment What is the length dimension in critical phenomena?
@Danu Well, I know what a dimesionless variable is. I just don't know how that applies. If a quantity is dimensionless, then in a scale invariant system, it should not depend on size. Is that it? Why? And if so, should any dimensionless quantity I could build behave that way? For example, if the susceptibility goes like $\chi\sim L^{\gamma/\nu}$, then $\chi/L^{\gamma/\nu}$ behaves that way although it has dimensions.
May
15
asked What is the length dimension in critical phenomena?
May
15
comment How to interpret a null critical exponent?
@MengCheng Ok, thank you
May
15
comment How to interpret a null critical exponent?
And is there any deeper reason for it instead of being just because the $\log$ function diverges slower than any power?
May
15
asked How to interpret a null critical exponent?
May
9
answered Density of particles in hexagonal lattice