Davide Morgante's user avatar
Davide Morgante's user avatar
Davide Morgante's user avatar
Davide Morgante
  • Member for 5 years, 7 months
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19 votes
Accepted

What is the difference between an Electron, a Tau, and a Muon?

16 votes

What does this notation for spin mean? $\mathbf{\frac 1 2}\otimes\mathbf{\frac 1 2}=\mathbf{1}\oplus\mathbf 0$

12 votes
Accepted

What does it mean for an operator to have both a continuous and discrete spectrum?

11 votes

A question regarding the commutators of operators

9 votes
Accepted

What will happen if I multiply a ket vector by a complex number?

8 votes

Why does the Standard Model predict zero mass for all vector bosons?

8 votes
Accepted

How to verify the Klein-Gordon field commutation relations, Peskin and Schroeder Equation (2.30)

7 votes

Why we can use $\frac{1}{V}\sum_{k \in 1BZ} \approx \int_{k\in 1BZ} \frac{dk}{(2\pi)^d}$ for phonons?

6 votes
Accepted

Why does the trace show up in such expressions?

6 votes

What happens if the wave function is multiplied by i?

5 votes
Accepted

How does the gauge-fixing term break gauge invariance?

5 votes
Accepted

Can the CKM quark mixing matrix be derived?

5 votes
Accepted

Physical interpretation of propagator pole

5 votes

Why is mass a form of energy?

5 votes

Deeper Meaning to the Nature of Lagrangian

5 votes
Accepted

What does quantised mean?

5 votes
Accepted

Poisson bracket of Hamiltonian with Hamiltonian always vanishes

5 votes
Accepted

Matrix representation of the operator $\hat{S}_x$ in the standard basis

4 votes

Linear algebra with Dirac notation

4 votes
Accepted

Noether's theorem derivation for fields

4 votes

How do I obtain the Dirac equation from the Euler-Lagrange equation?

4 votes
Accepted

How the Hamiltonian of a classical system expressed in quantum mechanics?

4 votes
Accepted

Dimensional analysis: on the choice of fundamental dimensions

4 votes

Levi-Civita and Kronecker Delta

4 votes
Accepted

Is it legal to add two physical quantities that behave differently under time-reversal, parity etc to define a new that has no definite behaviour?

4 votes
Accepted

Simple Explanation for Feynman Diagrams

3 votes
Accepted

Drawing Feynman diagrams including $\pi^0$-mesons

3 votes
Accepted

Why was the $Z$-boson first theorized? What problem did it solve?

3 votes

Average value of a given probability distribution of Quantum Mechanics

3 votes

Eigenstates of a spin 1 object

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