Qmechanic

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I'm a theoretical physicist.


487 Answers

newest activity votes
7
Why is the angle of the wake of a duck constant?
3
Motivation for Potentials
5
Why the Principle of Least Action?
4
How does a state vector be projected onto an eigenspace after measurement
4
Basic Grassmann/Berezin Integral Question
2
When can I use Wick's theorem?
4
Lagrangian of Schrodinger field
1
Galilean invariance of classical lagrangian
3
$\frac{1}{(1-x)_+}$ type distributions and parton distribution functions
5
Trouble with constrained quantization (Dirac bracket)
0
Finite difference formulation of the heat equation with thermal conductivity in 1D
2
Physical Interpretation of a Scalar Quantity Related to Currents/Conservation Laws
4
Proving that interval preserving transformations are linear
2
Proving that interval preserving transformations are linear
4
Maximal Gravity
6
Proving that interval preserving transformations are linear
3
D'Alembert's Principle: Where does $-Q_j$ come from?
5
D'Alembert's Principle and the term containing the reversed effective force
1
Lagrangians combining terms with 1 and 2 derivatives
2
What is the Jost function in scattering theory?
6
Charged Black holes - What is the Interest in those?
4
Deriving Newton's Third Law from homogeneity of Space
3
Does Noether's theorem also give rise to quantities conserved over space?
1
real world applications of Mathematics which use functions with singularities, not just as a matter of mathematical taste but for conceptual reasons
3
Why is the local field algebra $\mathfrak F(O)$ associated with a bounded non-empty open region $O$ of space-time not irreducible?
2
What is the conserved canonical momentum for a relativistically moving charge in a static Coulomb electric field?
3
What does the ordering of creation/annihilation operators mean?
2
proof of gauge invariance for quantum 1D ring
7
invariance of lagrangian in Noether's theorem
3
a question on Lagrange's equation when the time derivative of the generalized co-ordinates is constant
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