Categories
Tags
Representation-theory
New post in Representation-theory
Help trying to understand why the matrix representation of $J^2$ is what it is
May 15th, 2020
quantum-mechanics
operators
angular-momentum
representation-theory
hilbert-space
How do you add angular momentum of three or more particles in quantum mechanics?
February 15th, 2020
angular-momentum
representation-theory
quantum-mechanics
Why does a Lorentz scalar field transform as $U^{-1}(\Lambda)\phi(x)U(\Lambda) = \phi(\Lambda^{-1}x)$?
August 7th, 2022
quantum-field-theory
group-theory
representation-theory
special-relativity
Queries about rotational groups $\mathrm{SO}(3)$ and $\mathrm{SU}(2)$ in QM
April 29th, 2020
quantum-spin
quantum-mechanics
representation-theory
group-theory
angular-momentum
How are quantum fields related to representations of the Lorentz group?
July 31st, 2020
quantum-spin
representation-theory
lorentz-symmetry
group-theory
field-theory
Proof that $(1/2,1/2)$ Lorentz group representation is a 4-vector
August 1st, 2022
representation-theory
group-theory
lorentz-symmetry
lie-algebra
group-representations
What does Addition of Angular Momenta tell us about Group Theory?
August 1st, 2022
group-theory
quantum-mechanics
quantum-spin
representation-theory
lie-algebra
How to find a particular representation for the gamma matrices?
June 14th, 2020
quantum-mechanics
quantum-field-theory
representation-theory
dirac-matrices
How to decompose the representation of $\rm SU(5)$?
October 9th, 2021
grand-unification
beyond-the-standard-model
lie-algebra
representation-theory
group-theory
Does there exist finite dimensional irreducible rep. of Poincare group where translations act nontrivially?
December 4th, 2020
poincare-symmetry
group-representations
representation-theory
group-theory
special-relativity
Why the generators of boosts transform like a vector under rotation?
May 10th, 2020
vectors
special-relativity
lie-algebra
representation-theory
covariance
Explaining a quote by Weinberg about the significance of symmetry groups in physics
August 6th, 2020
soft-question
representation-theory
How does Schur's Lemma mean that the Dirac representation is reducible?
June 20th, 2020
representation-theory
dirac-matrices
On finite-dimensional unitary representations of non-compact Lie groups
August 1st, 2022
symmetry
unitarity
representation-theory
group-theory
Does a spin-2 particle really return to its previous state after 180° rotation?
June 3rd, 2021
quantum-spin
group-theory
representation-theory
topology
angular-momentum
Spin operators in QM
August 1st, 2022
quantum-mechanics
angular-momentum
quantum-spin
representation-theory
lie-algebra
"Reversed" Clebsch Gordan coefficients
August 1st, 2022
quantum-mechanics
angular-momentum
hilbert-space
representation-theory
Why the lowest order of matrices in Dirac equation are 4x4 matrices?
February 7th, 2020
dirac-matrices
representation-theory
dirac-equation
quantum-mechanics
Meaning of Lorentz Generators
April 14th, 2020
lie-algebra
lorentz-symmetry
special-relativity
field-theory
representation-theory
Coadjoint orbits in physics
April 8th, 2020
representation-theory
mathematical-physics
group-theory
Addition of spin angular momentum for massless particles
August 1st, 2022
helicity
quantum-mechanics
representation-theory
angular-momentum
Physically, what is a pseudoreal representation?
August 1st, 2022
particle-physics
charge-conjugation
representation-theory
group-theory
Representations of the Poincare group
August 1st, 2022
quantum-field-theory
poincare-symmetry
representation-theory
group-theory
special-relativity
Can one show that ${\gamma^5}^\dagger = \gamma^5$ directly from the anticommutation relations?
December 3rd, 2020
dirac-matrices
representation-theory
quantum-mechanics
spinor vs vector indices of Dirac gamma matrices
March 5th, 2020
tensor-calculus
representation-theory
spinors
dirac-matrices
Covariant derivative applied to a vector vs. applied to a matrix?
August 1st, 2022
representation-theory
terminology
gauge-theory
differential-geometry
Do spinors form a vector space?
August 1st, 2022
definition
vectors
spinors
group-theory
representation-theory
What is the difference between the dimension of a group and the dimension of its representation?
March 17th, 2020
representation-theory
group-representations
group-theory
Why are usually 4x4 gamma matrices used?
June 4th, 2020
representation-theory
dirac-equation
special-relativity
dirac-matrices
What are particle multiplets in the Standard Model?
August 1st, 2022
standard-model
representation-theory
particle-physics
symmetry
group-theory
←
1
2
3
4
5
6
7
8
9
…
21
22
→