user avatar
user avatar
user avatar
SRS
  • Member for 8 years, 6 months
  • Last seen this week
  • India
65 votes
3 answers
7k views

Idea of Covering Group

65 votes
6 answers
10k views

Why does a system try to minimize its total energy?

30 votes
2 answers
3k views

Scattering, Perturbation and asymptotic states in LSZ reduction formula

25 votes
5 answers
5k views

Newton's law requires two initial conditions while the Taylor series requires infinite!

24 votes
1 answer
6k views

Self-adjoint and unbounded operators in QM

24 votes
2 answers
3k views

Relation between Wilsonian renormalization and Counterterm Renormalization

23 votes
3 answers
7k views

Symmetry Breaking And Phase transition

23 votes
2 answers
2k views

What is the conclusion from Aharonov-Bohm Effect?

22 votes
2 answers
7k views

What does a $\rm SU(2)$ isospin doublet really mean?

20 votes
3 answers
2k views

In what sense is the proper/effective action $\Gamma[\phi_c]$ a quantum-corrected classical action $S[\phi]$?

18 votes
3 answers
17k views

Constructing Lagrangian from the Hamiltonian

18 votes
1 answer
4k views

Does the number density of photons $n_\gamma\approx 10^8 \:\mathrm m^{-3}$ refer to CMB photons only?

16 votes
2 answers
3k views

Rest mass of phonon: is this concept definable?

16 votes
2 answers
906 views

Why is Higgs particle detected much later than top quark when it's lighter? [duplicate]

16 votes
3 answers
2k views

Are the first order phase transitions always associated with a latent heat?

16 votes
7 answers
5k views

Why the electrons below the Fermi level do not conduct electricity?

15 votes
1 answer
2k views

QED and anomaly

15 votes
1 answer
3k views

Boosts are non-unitary!

15 votes
2 answers
3k views

What is the orbital angular momentum (OAM) of individual photons?

14 votes
1 answer
1k views

Localized field quanta?

14 votes
1 answer
14k views

Majorana mass vs Dirac Mass

14 votes
1 answer
566 views

What are the minimal postulates to do quantum mechanics in path-integral formulation without knowing the operator formulation?

13 votes
2 answers
2k views

Does classical electrodynamics have $U(1)$ symmetry? If yes, how?

13 votes
3 answers
562 views

Why do we take two different approaches to the "meaning of causality" in quantum mechanics and quantum field theory?

13 votes
2 answers
317 views

What is the physical implication(s) of the isomorphism between ${\rm SO}(2)$ and $\mathbb{R}/\mathbb{Z}$?

13 votes
6 answers
4k views

How do we prove that the 4-current $j^\mu$ transforms like $x^\mu$ under Lorentz transformation?

13 votes
4 answers
3k views

What would qualify as a deceleration rather than an acceleration if speed is unchanged?

13 votes
4 answers
3k views

Temperature of electroweak phase transition

13 votes
6 answers
1k views

Charged particle as observed from an inertial and a non-inertial frame of reference

13 votes
3 answers
682 views

Why don't we have a "Cooper pair" of two holes in a superconductor?

1
2 3 4 5
27