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I am a physics undergrad with interests in theoretical physics and mathematics.


Oct
9
awarded  Popular Question
Sep
5
comment What is R-symmetry with supersymmetric theory?
@LubošMotl: Why can't I have a group which is larger than SU(N)? say $GL(n,\mathbb{C})$ for example?
Aug
17
revised Comprehensive book on group theory for physicists?
added 32 characters in body
Aug
10
awarded  Popular Question
Jul
12
revised Dirac, Weyl and Majorana Spinors
technical error, should be double cover of $SO(3,1)$, added details
Jul
11
comment Dirac, Weyl and Majorana Spinors
@Murod: Shoudn't your first sentence read double cover of $SO(3,1)$, spinors are representations of $SL(2,C)$ which is the double cover of $SO(3,1)$ - the lorentz group also called projective representations of the lorentz group for the same reason.
Jul
4
comment From Symmetry Group to Physics Equations
@ACuriousMind: How do I match the idea of $SO(3)$ as the basis vectors of irreps of $SO(3)$ with its formal definition of some generators satisfying some commutation relation. What are the generators here, and how do you define the commutator in this case? More info about spherical harmonics as irreps of $SO(3)$ and some references will be appreciated.
Jul
2
awarded  Inquisitive
Jul
2
awarded  Curious
Jul
1
reviewed Approve suggested edit on Can I compute the mass of a coin based on the sound of its fall?
Jun
30
comment How can Lorentz contraction be “directly” measured?
@Ruslan: This maybe useful. itis.volta.alessandria.it/episteme/ep6/ep6-lars1.htm
Jun
30
comment Confusion regarding the principle of least action in Landau's “The Classical Theory of Fields”
If the argument holds for the the infinitesimal case surely it holds for the finite length case.
Jun
30
reviewed Approve suggested edit on Why Does Gravity Work?
Jun
30
reviewed Approve suggested edit on Whenever we fill a bottle with cold water and close it, why is it that after a few seconds we notice cold water droplets outside the bottle?
Jun
30
reviewed Approve suggested edit on Intuition for when the replica trick should work and why it works
Jun
29
comment QFT's that have no action
@user1504: Please can you give me the explicit state-operator correspondence for CFTs in other than 2 dimensions. Eigenvectors of dilation operation $L_0$ would give you states, not the primary fields corresponding to those states. I am not sure how you get the state-operator correspondence in more than 2 dimensions.
Jun
29
comment Black hole thermodynamics in a time dependent metric
@Sourav: Please could you give me the reference from which you are learning black hole thermodynamics?
Jun
29
comment George Green's definition of Green's function
@V: I am curious as to why the name kernel was chosen for the inverse. Does it have any relation with how the "kernel" (set of points in domain which map to 0) of a map behaves?
Jun
29
comment Integrating the generator of the infinitesimal special conformal transformation
@LubošMotl: Thanks for the answer, I had not noticed before that multiplies of $b_{\mu}$ map to itself, so a SCT is a bit like rotating your Riemann sphere along the longitude defined by $ k b_{\mu}$,until a point on that longitude gets mapped to the north pole ?
Jun
29
revised QFT's that have no action
added 350 characters in body