User QFTheorist

9 votes

2 answers

810 views

Showing that loop corrections are quantum effects in Quantum Field Theory

asked Nov 25, 2022 at 8:52

9 votes

6 answers

2k views

What exactly is a quantum field?

asked Feb 1 at 13:18

7 votes

1 answer

553 views

Most general form of a spin rotation invariant Hamiltonian?

asked Jan 11, 2023 at 10:57

5 votes

0 answers

101 views

Derivation of the Conformal Ward Identity in Di Francesco et al

asked Nov 29, 2023 at 13:48

5 votes

2 answers

414 views

Is the self-dual point always a critical point?

asked Sep 28, 2023 at 10:01

3 votes

1 answer

61 views

Confusion regarding time ordering in the Ward Identity derivation

asked Oct 21, 2023 at 13:01

3 votes

1 answer

57 views

What are single-, double- and multi-trace operators in AdS/CFT?

asked Apr 10 at 17:55

3 votes

0 answers

190 views

Vacuum matrix elements

asked Oct 29, 2022 at 14:41

3 votes

0 answers

39 views

Finding the OPE coefficients when the correlator and block decomposition is given

asked Sep 12, 2023 at 7:10

3 votes

1 answer

835 views

Actual magnetic field inside a toroid

asked Feb 15, 2020 at 8:43

2 votes

1 answer

6k views

Formula for secondary maxima in Fraunhofer Diffraction?

asked Feb 18, 2020 at 9:04

2 votes

2 answers

300 views

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

asked Nov 30, 2022 at 15:16

2 votes

0 answers

235 views

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

asked Feb 23, 2023 at 18:07

2 votes

1 answer

85 views

Deriving Feynman rules for scalar QED

asked Feb 5 at 19:54

2 votes

1 answer

141 views

Confusion regarding simplifying normal ordered products in CFT

asked Dec 23, 2023 at 7:28

2 votes

1 answer

103 views

In what sense are fields representations of the Poincare group?

asked Jan 31 at 13:03

2 votes

2 answers

108 views

Phase transition in Ising Model with local $\mathbb{Z}_2$ symmetry

asked Nov 2, 2023 at 21:25

1 vote

1 answer

97 views

Obtaining the Ising and XY model from the XYZ $O(3)$ model

asked Nov 8, 2023 at 13:33

1 vote

0 answers

73 views

Why is my Ising Gauge Theory calculation showing magnetization?

asked Nov 19, 2023 at 9:34

1 vote

1 answer

88 views

Expectation value of the exponential of a quadratic term in fields

asked Nov 25, 2023 at 14:47

1 vote

1 answer

87 views

Conceptual difficulties with spin

asked Oct 5, 2023 at 16:56

1 vote

1 answer

93 views

Weights and roots of $SU(3)$

asked Jan 27 at 9:55

1 vote

1 answer

42 views

Choice of spacetime foliation while quantising a conformal field theory

asked Apr 7 at 12:42

1 vote

0 answers

25 views

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

asked Apr 23, 2023 at 9:27

1 vote

0 answers

64 views

Deriving the change in photon frequency under a change of coordinates

asked Jun 24, 2023 at 19:22

1 vote

0 answers

210 views

Question regarding derivative couplings in QFT

asked Dec 6, 2022 at 6:11

1 vote

0 answers

179 views

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

asked Nov 26, 2022 at 18:45

1 vote

0 answers

51 views

Quantum Particles on a circle and Circulant matrices [closed]

asked Nov 30, 2022 at 11:10

1 vote

2 answers

514 views

Deriving the transformation law for the Christoffel symbols

asked Jul 11, 2021 at 19:07

0 votes

2 answers

176 views

How do I diagonalize this Hamiltonian? [closed]

asked Sep 14, 2022 at 20:53

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36 Questions

Showing that loop corrections are quantum effects in Quantum Field Theory

What exactly is a quantum field?

Most general form of a spin rotation invariant Hamiltonian?

Derivation of the Conformal Ward Identity in Di Francesco et al

Is the self-dual point always a critical point?

Confusion regarding time ordering in the Ward Identity derivation

What are single-, double- and multi-trace operators in AdS/CFT?

Vacuum matrix elements

Finding the OPE coefficients when the correlator and block decomposition is given

Actual magnetic field inside a toroid

Formula for secondary maxima in Fraunhofer Diffraction?

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

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

Deriving Feynman rules for scalar QED

Confusion regarding simplifying normal ordered products in CFT

In what sense are fields representations of the Poincare group?

Phase transition in Ising Model with local $\mathbb{Z}_2$ symmetry

Obtaining the Ising and XY model from the XYZ $O(3)$ model

Why is my Ising Gauge Theory calculation showing magnetization?

Expectation value of the exponential of a quadratic term in fields

Conceptual difficulties with spin

Weights and roots of $SU(3)$

Choice of spacetime foliation while quantising a conformal field theory

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

Deriving the change in photon frequency under a change of coordinates

Question regarding derivative couplings in QFT

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

Quantum Particles on a circle and Circulant matrices [closed]

Deriving the transformation law for the Christoffel symbols

How do I diagonalize this Hamiltonian? [closed]