Qmechanic

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488 Answers

newest activity votes
1
Where is the magnetic self energy term in $L$ for a charged particle in an electromagnetic field?
3
Non-SHM oscillatory motion
3
primary constraints for constrained Hamiltonian systems
1
Calculating Average Velocity
1
Prove an action expansion's even-indexed terms have to be integrated, where the odd-indexed terms are only derivatives of the potential (WKB)
1
From Lagrangian to Hamiltonian in Fermionic Model
3
Why is this identity an if, rather than if and only if?
4
Noether theorem, gauge symmetry and conservation of charge
1
Relating generalized momentum, generalized velocity, and kinetic energy: $2T_{i}=p_{i}\dot{q_{i}}$
1
Weyl Ordering Rule
5
Is the momentum operator diagonal in position representation?
1
Dirac magnetic monopoles and electric charge quantization
2
Must the Lagrangian always be known for the Euler-Lagrange equations to be of any use?
2
The string Poisson bracket
1
Other application of Liouville's theorem besides thermodynamics
3
Is this field redefinition for free scalar field theory non-local?
3
Eigenfunctions in periodic potential
3
Regarding real field Klein Gordon Equations
1
Varying an action (cosmological perturbation theory)
3
Bianchi identity of a non-Abelian gauge theory?
2
Does a constant of motion always imply a Hamiltonian formulation?
3
Why path integral approach may suffer from operator ordering problem?
1
Correlation, Time Ordering, and Observables
1
Constants of motion vs. integrals of motion
0
Derivatives of operators
2
Relation between the determinants of metric tensors
1
Wavefunction restrictions of odd potentials
1
Are Poisson brackets of second-class constraints independent of the canonical coordinates?
4
Imaginary time and string theory
3
Sum of two density matrices: $\rho=p_1\rho_1+p_2\rho_2$
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