User QFTheorist - Physics Stack Exchange

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QFTheorist

Member for 6 years, 11 months
Last seen more than a week ago

19 Questions

Score Activity Newest Views

9 votes

2 answers

571 views

Showing that loop corrections are quantum effects in Quantum Field Theory

asked Nov 25, 2022 at 8:52

7 votes

1 answer

456 views

Most general form of a spin rotation invariant Hamiltonian?

asked Jan 11 at 10:57

3 votes

1 answer

611 views

Actual magnetic field inside a toroid

asked Feb 15, 2020 at 8:43

2 votes

1 answer

5k views

Formula for secondary maxima in Fraunhofer Diffraction?

asked Feb 18, 2020 at 9:04

2 votes

0 answers

114 views

Mathematical result for one-loop diagram of $\phi^3$ theory in four dimensions

asked Feb 23 at 18:07

2 votes

1 answer

120 views

Vacuum matrix elements

asked Oct 29, 2022 at 14:41

2 votes

2 answers

202 views

Interesting relationship between the 2D Harmonic Oscillator and Pauli Spin matrices

asked Nov 30, 2022 at 15:16

1 vote

0 answers

103 views

Question regarding derivative couplings in QFT

asked Dec 6, 2022 at 6:11

1 vote

0 answers

43 views

Quantum Particles on a circle and Circulant matrices [closed]

asked Nov 30, 2022 at 11:10

1 vote

0 answers

66 views

Two-point function for a real scalar field with a derivative coupling

asked Nov 26, 2022 at 18:45

1 vote

2 answers

328 views

Deriving the transformation law for the Christoffel symbols

asked Jul 11, 2021 at 19:07

1 vote

0 answers

21 views

Proving that the Faddeev-Popov path integral is independent of the gauge choice? [duplicate]

asked Apr 23 at 9:27

0 votes

2 answers

110 views

How do I diagonalize this Hamiltonian? [closed]

asked Sep 14, 2022 at 20:53

0 votes

0 answers

75 views

How do I show that the fermion creation operator creates a particle with spin 1/2?

asked Oct 19, 2022 at 19:27

0 votes

0 answers

31 views

Showing the effect of $C$, $P$ and $T$ operators for the Dirac fermion

asked Nov 27, 2022 at 9:33

0 votes

1 answer

2k views

Proving Green's Reciprocity theorem

asked Mar 12, 2020 at 10:24

0 votes

0 answers

19 views

Resources to consult alongside Griffiths? [duplicate]

asked Mar 18, 2020 at 16:06

0 votes

0 answers

24 views

Berry curvature in cartesian coordinates

asked Mar 12 at 20:47

0 votes

0 answers

29 views

Berry phase for nuclear magnetic resonance

asked Mar 18 at 17:40