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Hermitian_hermit
  • Member for 8 years, 2 months
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25 votes
4 answers
1k views

How does complexifying a Lie algebra $\mathfrak{g}$ to $\mathfrak{g}_\mathbb{C}$ help me discover representations of $\mathfrak{g}$?

12 votes
2 answers
653 views

Is it possible to derive the Aharonov-Bohm effect using translation operators alone?

11 votes
1 answer
1k views

Is a Wick rotation a change of coordinates?

10 votes
2 answers
1k views

What does it mean to act a Dirac field operator on the vacuum?

10 votes
1 answer
605 views

Are the components of 4-vectors the physically measured quantities?

9 votes
4 answers
5k views

Tensor product vs. Cartesian Product for composite quantum systems

9 votes
4 answers
6k views

Heisenberg Picture with a time-dependent Schrödinger Hamiltonian

9 votes
1 answer
3k views

How did Heisenberg come up with matrix mechanics?

9 votes
2 answers
2k views

Noether's theorem for arbitrary conformal coordinate transformations

9 votes
3 answers
1k views

Are all Lagrangians translationally invariant?

8 votes
3 answers
2k views

Is the shorthand $ \partial_{\mu} $ strictly a partial derivative in field theory?

8 votes
1 answer
2k views

Difference between phase space and Hilbert space? [closed]

7 votes
1 answer
309 views

Fusion of anyons

7 votes
2 answers
850 views

Symmetries in quantum mechanics

6 votes
1 answer
1k views

What is the definition of a symmetry of an action?

6 votes
3 answers
3k views

Why is a wave pulse a superposition of sine waves?

6 votes
5 answers
3k views

Is it a coincidence that quantum harmonic oscillators and photons have energy quantised as $E=hf$?

5 votes
1 answer
3k views

In QM we have position and momentum space, what about energy space?

5 votes
3 answers
1k views

Are generalised coordinates truly independent?

5 votes
4 answers
11k views

Are vectors truly independent of coordinate systems?

5 votes
2 answers
570 views

Are the two definitions of a Majorana fermion equivalent?

5 votes
2 answers
907 views

Is the path integral amplitude a wavefunction?

5 votes
1 answer
3k views

Solving the Schrodinger equation with a time-dependent Hamiltonian

5 votes
1 answer
762 views

Varying the Dirac action with differential forms

5 votes
1 answer
900 views

Why does an energy band crossing the Fermi energy mean the gap closes?

5 votes
1 answer
444 views

Deriving the non-abelian Aharonov-Bohm effect as a Berry phase

5 votes
1 answer
418 views

Bloch's theorem for a lattice with sublattices

5 votes
1 answer
1k views

Diagonalising a fermionic Hamiltonian via Bogoliubov transformation

5 votes
3 answers
694 views

Does the Dirac Hamiltonian uniquely define the Dirac Lagrangian?

4 votes
0 answers
374 views

Is the continuum limit equivalent to the low-energy limit?