Categories
Tags
Field-theory
New post in Field-theory
Electric potential inside a shell
October 1st, 2020
potential
electrostatics
field-theory
Translations and Noether's Theorem
May 18th, 2020
symmetry
field-theory
noethers-theorem
lagrangian-formalism
conservation-laws
Proof that Energy Momentum Tensor of Scalar Field Theory satisfies Weak Energy Condition
March 10th, 2020
spacetime
field-theory
energy
general-relativity
The equipartition theorem in momentum space
February 15th, 2020
statistical-mechanics
specific-reference
field-theory
turbulence
First class and second class constraints
December 21st, 2020
gauge-theory
field-theory
hamiltonian-formalism
constrained-dynamics
Zero dimensional field theory
February 18th, 2021
quantum-field-theory
path-integral
field-theory
spacetime-dimensions
Active transformation and passive transformation of a scalar field
January 21st, 2020
lorentz-symmetry
field-theory
special-relativity
coordinate-systems
Regarding the Weyl spinor and its transformation properties
July 24th, 2020
lorentz-symmetry
field-theory
special-relativity
homework-and-exercises
spinors
How are quantum fields related to representations of the Lorentz group?
July 31st, 2020
lorentz-symmetry
representation-theory
group-theory
field-theory
quantum-spin
What is the essence of BCFW recursion techniques?
September 22nd, 2020
string-theory
quantum-field-theory
quantum-gravity
field-theory
Can we find the boundary conditions of fields from the stationary action principle?
December 12th, 2021
relativity
field-theory
variational-principle
action
variational-calculus
What is the definition of soliton?
October 1st, 2020
field-theory
definition
solitons
Is internal symmetry the same as gauge symmetry?
March 2nd, 2020
field-theory
gauge-symmetry
symmetry
terminology
Mathematical interpretation of Poisson Brackets
September 11th, 2020
functional-derivatives
poisson-brackets
dirac-delta-distributions
field-theory
mathematical-physics
Why is there no kinetic term in the Hamiltonian of the Ising model?
August 1st, 2022
field-theory
hamiltonian-formalism
statistical-mechanics
ising-model
Is String Theory a Field Theory?
August 7th, 2020
string-field-theory
field-theory
string-theory
Classical Field Theory - Continuum limit in forming the Lagrangian density and the elasticity modulus
August 1st, 2022
elasticity
field-theory
lagrangian-formalism
lattice-model
continuum-mechanics
What's the difference between perturbative QCD, non-perturbative QCD, and gauge theory QCD?
August 1st, 2022
field-theory
gauge-theory
quantum-chromodynamics
perturbation-theory
non-perturbative
About the notion of the self-interaction of a field
September 3rd, 2020
quantum-field-theory
lagrangian-formalism
terminology
field-theory
interactions
Showing that Coulomb and Lorenz Gauges are indeed valid Gauge Transformations?
September 28th, 2020
gauge
gauge-invariance
gauge-theory
field-theory
electromagnetism
What is the Lagrangian from which the Klein-Gordon equation is derived in QFT?
September 15th, 2021
klein-gordon-equation
field-theory
metric-tensor
lagrangian-formalism
Simple conceptual question conformal field theory
December 15th, 2020
metric-tensor
field-theory
coordinate-systems
conformal-field-theory
scale-invariance
Local versus non-local functionals
June 26th, 2020
non-locality
locality
field-theory
lagrangian-formalism
Generator of local symmetries
April 6th, 2020
field-theory
symmetry
quantum-field-theory
What is the difference between kinetic momentum $p=mv$ and canonical momentum?
January 21st, 2021
field-theory
classical-mechanics
lagrangian-formalism
momentum
definition
Is the Lagrangian density a functional or a function?
January 17th, 2020
lagrangian-formalism
field-theory
definition
variational-calculus
Noether currents in QFT
February 11th, 2020
noethers-theorem
field-theory
symmetry
string-theory
quantum-field-theory
Why can we neglect surface terms in Field Theory?
October 9th, 2020
boundary-conditions
gauss-law
field-theory
boundary-terms
Functional derivative and variation of action $S$ vs Lagrangian $L$ vs Lagrangian density $\mathcal{L}$ vs Lagrangian 4-form $\mathbf{L}$
August 26th, 2020
general-relativity
lagrangian-formalism
field-theory
variational-calculus
functional-derivatives
Why is a theory Lorentz invariant if the Lagrangian is Lorentz invariant?
April 21st, 2020
action
special-relativity
field-theory
symmetry
lagrangian-formalism
←
1
2
3
4
5
6
7
8
9
…
45
46
→