Qmechanic

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I'm a theoretical physicist.


482 Answers

newest activity votes
4
QED BRST Symmetry
2
Proving the time-evolution of momentum operator
6
Simple QFT exercise
3
Derivation of total momentum operator QFT
2
Period of an Object in Periodic Motion
2
Creation and Annialation Operators and Kinetic Energy Matrix Elements
0
Generalizing Heisenberg Uncertainty Priniciple
0
Hydrogen radial wave function infinity at r=0
1
Classical limit of a quantum system
0
How do I derive this series for this unitary operator?
3
eigenvalue staircase and hamiltonians
3
Computing a density of states of Hamiltonian $ H=xp$
4
Infinitely charged wire and Differential form of Gauss' Law
5
Operators Uncertainty
5
Why/How is this Wick's theorem?
2
Dilation invariant lattice
1
If the S-matrix has symmetry group G, must the fields be representations of G?
3
Is the Lagrangian of a quantum field really a 'functional'?
3
Why is $L^2$ norm of the gradient called kinetic energy?
1
Physical Significance for Duality Formula for Entropy
1
semiclassical exact expression (in one dimension only)
3
Is the change in kinetic energy of a particle frame independent?
5
The form of Lagrangian for a free particle
2
Equivalent system in Centre manifold theory
2
A Question about Virtual Work related to Newton's Third Law
1
Basic Question - Green's Functions in Quantum Mechanics
9
Deriving the Lagrangian for a free particle
0
Why can we treat quantum scattering problems as time-independent?
6
Proof that the One-Dimensional Simple Harmonic Oscillator is Non-Degenerate?
3
can one introduce magnetic monopoles without Dirac strings?
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