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10h
asked Why does the superconductivity hamiltonian have a µ term, while the superfluid does not?
Apr
3
accepted Product of deltas in kinetic second quantization hamiltonian
Apr
3
accepted Tricks at manipulating creation/annihilation operators
Apr
1
comment Product of deltas in kinetic second quantization hamiltonian
Thanks! A bit off-topic but I wonder if there is something important in that term being diagonal in a certain basis. Is there something special in the connection between position and momentum such that the coefficients are diagonal?
Apr
1
revised Product of deltas in kinetic second quantization hamiltonian
corrected
Apr
1
asked Product of deltas in kinetic second quantization hamiltonian
Mar
19
awarded  Teacher
Jan
9
answered Why do I see things better when they're reflected through my iphone screen?
Jan
9
comment Why do I see things better when they're reflected through my iphone screen?
Also now I noticed that you are looking at the image of an LCD screen which is in itself polarized. If the effect is ascrivable to polarization there are 2 angles that should matter: the angle you are looking at the covering glass from "aside" (look up Brewster's angle) and the angle at which the computer screen is tilted when you look at it since its light is itself polarized
Jan
9
comment Why do I see things better when they're reflected through my iphone screen?
The reflected image is actually partially polarized. Perhaps you see images sharper when they are polarized. Just for curiosity you may want to try polarizing glasses
Nov
5
accepted Is the physics of $j = \rho v$ questionable? What are the consequences?
Nov
4
awarded  Commentator
Nov
4
comment Is the physics of $j = \rho v$ questionable? What are the consequences?
@ACuriousMind It would be the same thing to say that $1/2I\omega^2$ and $1/2 m v^2$ are conceptually different because of the units
Nov
4
comment Is the physics of $j = \rho v$ questionable? What are the consequences?
@ACuriousMind I actually fail to see the reason for them to be different. Perhaps you can help?
Nov
4
asked Is the physics of $j = \rho v$ questionable? What are the consequences?
Oct
1
comment Meaning of the chemical potential for a boson gas
But wasn't it the other way around? i.e. $dE=−PdV+TdS+\mu dN$ and $\mu= +\frac{\partial E}{\partial N}$...
Aug
27
accepted If you dig a deep tunnel, will the rock sublimate?
Aug
26
asked If you dig a deep tunnel, will the rock sublimate?
Aug
23
accepted Is a superposition of (anti)symmetric states (anti)symmetric?
Aug
22
asked Is a superposition of (anti)symmetric states (anti)symmetric?