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Sean E. Lake's user avatar
Sean E. Lake's user avatar
Sean E. Lake's user avatar
Sean E. Lake
  • Member for 10 years, 1 month
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24 votes
1 answer
4k views

What does the identity operator look like in Quantum Field Theory?

22 votes
1 answer
3k views

How is conditional probability handled in quantum mechanics?

12 votes
1 answer
3k views

How do I Derive the Green's Function for $-\nabla^2 + m^2$ in $d$ dimensions?

12 votes
3 answers
2k views

Standard Model Proton Decay Rate

11 votes
1 answer
720 views

What's the difference between a time crystal and a system undergoing periodic motion?

11 votes
3 answers
1k views

What are the details behind causality and Maxwell's equations?

9 votes
1 answer
728 views

Non-Euclidean Phase Space?

8 votes
0 answers
213 views

Has the Helmholtz decomposition of the $\mathbf{E}$ field from the Liénard–Wiechert potentials been worked out?

7 votes
2 answers
610 views

Is Helmholtz decomposition inherently a non-local operation?

7 votes
1 answer
1k views

What is the high temperature molar heat capacity of $\mathrm{CO}_2$ (carbon dioxide)?

7 votes
2 answers
967 views

Is the gauge transform field in electromagnetism a Lagrange multiplier?

6 votes
3 answers
151 views

What is the radiation field of a black body with temperature $T$ translating at speed $v$?

6 votes
2 answers
744 views

Is there a "canonical" way to parameterize elements of $\operatorname{SO}(N)$?

6 votes
1 answer
2k views

What are the gauge invariant parts of the Yang-Mills field strength tensor?

6 votes
1 answer
314 views

Is it possible to construct a pure Bosonic creation operator in scalar QFT?

5 votes
1 answer
2k views

Interpreting the inhomogeneous wave equations for $\vec{E}$ and $\vec{B}$

5 votes
1 answer
936 views

How pure is the tone produced by a typical tuning fork in air?

5 votes
3 answers
437 views

What does a circularly polarized electromagnetic plane wave look like in a co-rotating reference frame?

5 votes
1 answer
124 views

Do black holes resonate?

4 votes
1 answer
176 views

Under what conditions would carbon-12 form a Bose-Einstein condensate?

4 votes
1 answer
2k views

How does apparent depth depend on viewing angle?

4 votes
2 answers
816 views

What is the Interpretation of This Field Operator: $\vec{X} = \int \pi \vec{x} \phi \operatorname{d}^3 x$?

4 votes
2 answers
469 views

Does the Meissner effect preclude currents from the bulk of superconductors?

4 votes
1 answer
66 views

Neutrinos and Gravity - Feasbility of Beam Experiments?

4 votes
0 answers
164 views

QFT Superposition and the Higgs Ground State

4 votes
1 answer
371 views

What is a neutron's polarizability?

3 votes
2 answers
939 views

Is it possible to build a solid state water pump?

3 votes
2 answers
632 views

How is the $\langle\psi| x(t')\, x(t)|\psi\rangle$ interpreted in the Heisenberg picture?

3 votes
1 answer
384 views

Contradictory solutions to the Klein-Gordon equation as an initial value problem (canonical formulation)

3 votes
0 answers
129 views

Examples in QFT of Eigenvectors of $H$ that are not Eigenvectors with Constant Eigenvalues of $\mathcal{H}$?