SolubleFish's user avatar
SolubleFish's user avatar
SolubleFish's user avatar
SolubleFish
  • Member for 2 years, 11 months
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  • Paris, France
8 votes
Accepted

When do two state functions represent the same quantum state?

1 vote
Accepted

Why is $\frac{1}{2}\delta_Z(\partial_\mu \phi_r)^2 - \frac{1}{2}\delta_m \phi_r^2$ treated together in Feynman diagrams?

0 votes

In QFT when performing path integral, why don’t we divide it by the volume of Poincaré group, as what we did for gauge group?

3 votes

How can a QFT field act on particle states in Fock space?

1 vote
Accepted

Non-perturbative matrix element calculation

0 votes

Quantization of a massless scalar

2 votes
Accepted

Expectation of momentum in the bound state

0 votes
Accepted

Does the momentum operator applied to a position state vanish?

2 votes
Accepted

What am I solving when I use Klein-Gordon equation?

5 votes

Floquet Hilbert Space

1 vote
Accepted

Computation of the Force acting on an electric dipole

2 votes

How can energy be discrete when momentum and position are not?

4 votes
Accepted

How does a vector field transform in quantum mechanics?

1 vote

Applying Wick's theorem to mass-terms in a free field theory

0 votes

Mixed quantum states represented by density matrices - proof

1 vote

Why is a symmetry transformation defined to preserve $|\langle\phi|\psi\rangle|^2$?

3 votes

Schrödinger equation in QFT

2 votes

Grassmann parameter in supersymmetry

3 votes
Accepted

Momentum space representation and time dependency

0 votes

How does $e^{-i\vec a \cdot \vec p}$ translate a quantum system?

0 votes
Accepted

Differentiating the index notation

3 votes

Quantum field theory prerequisites

0 votes

Lindblad equation from microscopic principles for free particles with momentum interactions

7 votes

Why does a ball when bounced at an angle not come back to you?

18 votes
Accepted

Physical meaning of functional derivative of Coulomb potential energy

2 votes
Accepted

Can Fock space be written as a tensor product? (Cohen Tannoudji Vol. 3 book)

6 votes
Accepted

Showing that loop corrections are quantum effects in Quantum Field Theory

8 votes

Single-particle states vs. basis states vs. eigenkets vs. quantum numbers

3 votes
Accepted

Physical relevance of $\varphi \in \operatorname{Aut}(G)$ in Fourier transform on $L^2(G)$

2 votes
Accepted

Correct way to expand the generating functional

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