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11 answers
304 votes
45k views
204 bookmarks
What experiment would disprove string theory?
8 answers
123 votes
10k views
38 bookmarks
Does a particle exert force on itself?
9 answers
115 votes
31k views
112 bookmarks
What, in simplest terms, is gauge invariance?
3 answers
83 votes
76k views
69 bookmarks
First and second order phase transitions
5 answers
67 votes
32k views
61 bookmarks
What is the connection between Poisson brackets and commutators?
5 answers
26 votes
4k views
17 bookmarks
What is the physical meaning of a "complete" Hilbert space in QM?
4 answers
25 votes
6k views
18 bookmarks
Is there a physics Puzzles site like Project Euler?
2 answers
21 votes
4k views
20 bookmarks
How can entropy increase in quantum mechanics?
2 answers
19 votes
3k views
21 bookmarks
Problems while Wick rotating the path integral
1 answer
16 votes
1k views
6 bookmarks
What are common methods for calculating the time dependency of elliptical orbit?
3 answers
14 votes
2k views
10 bookmarks
Are the first order phase transitions always associated with a latent heat?
3 answers
12 votes
2k views
1 bookmarks
Car accident, put in park or neutral?
1 answer
12 votes
791 views
6 bookmarks
Invariant polynomials of the Landau theory of phase transitions (crystal symmetry?)
2 answers
12 votes
352 views
5 bookmarks
Does the fluctuations-dissipation theorem hold in active matter for macroscopic physical quantities?
3 answers
10 votes
816 views
2 bookmarks
How many qubits does it take to specify an event in spacetime?
2 answers
9 votes
11k views
10 bookmarks
Angular momentum for 3D harmonic oscillator in two different bases
2 answers
9 votes
387 views
4 bookmarks
Nuclear-transition laser
1 answer
9 votes
570 views
3 bookmarks
How to make sense of quantum fields differential equations?
6 answers
8 votes
28k views
3 bookmarks
How to Make RF Waves Visible
2 answers
7 votes
321 views
3 bookmarks
Concurrence in higher dimensions?
2 answers
7 votes
1k views
4 bookmarks
How to calculate the angular momentum states of isotropic quantum harmonic oscillator?
2 answers
7 votes
1k views
2 bookmarks
Why only even powers of the order parameter in the Ginzburg-Landau theory for superconductivity
2 answers
7 votes
612 views
2 bookmarks
Clifford Algebra: Wedge product, cross product, and Hodge duality
3 answers
6 votes
3k views
6 bookmarks
Why does the moon appear bigger close to the horizon, rising or setting?
2 answers
6 votes
443 views
6 bookmarks
How bad would it break physics if dark matter was not “particles”?
1 answer
6 votes
254 views
3 bookmarks
How to model RNA-DNA and DNA-DNA binding as a “string matching" problem in statistical physics?
2 answers
5 votes
2k views
6 bookmarks
Laplace transform of partition function a general result or a mathematical result?
1 answer
5 votes
394 views
1 bookmarks
Randomness and Thermodynamics
4 answers
5 votes
831 views
5 bookmarks
The symmetry group and representation of spin-$N$ particle
1 answer
4 votes
468 views
5 bookmarks
Link between the Grassmann algebra and spinors