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Jan
3
awarded  Popular Question
Jan
1
revised Confusion with poles of single particle green's function / propagator
added 996 characters in body; edited tags; edited title
Jan
1
asked Confusion with poles of single particle green's function / propagator
Nov
23
comment Is angular momentum conserved for a mass fixed to a horizontal guide
Good, just checking I haven't gone mad. I think the lecturer applied Noether's theorem to the case of origin at the crossing point to show the Lagrangian is not invariant. However, from further reading I believe Noether's theorem is not valid if the transformation breaks the constraints. So performing a rotation to check for angular momentum conservation is not valid as it breaks the horizontal and vertical constraints.
Nov
23
accepted Is angular momentum conserved for a mass fixed to a horizontal guide
Nov
23
comment Is angular momentum conserved for a mass fixed to a horizontal guide
This agrees with my thought process. Thank you for confirmation!
Nov
23
comment Is angular momentum conserved for a mass fixed to a horizontal guide
I agree. But, is angular momentum conserved about the origin at the crossing point of the guides?
Nov
23
comment Is angular momentum conserved for a mass fixed to a horizontal guide
@brucesmitherson please note i've edited first paragraph to make question more explicit
Nov
23
revised Is angular momentum conserved for a mass fixed to a horizontal guide
made question more explicit
Nov
23
asked Is angular momentum conserved for a mass fixed to a horizontal guide
Aug
19
asked Fabrication of highly ordered arrays of metallic nanorods
Jun
17
comment Resolution of two frequencies
I still was hoping to have a source for this but I guess that'll do.
Jun
17
comment Resolution of two frequencies
Ok I see. In this case for my purposes I'm considering two identical distributions. If I approximate them as normal distributions then I calculated it means I need a frequency separation of $\Delta\omega > 2\sqrt{\ln (4)}\sigma$
Jun
17
comment Resolution of two frequencies
Sure, I'd be happy to use FWHM, and I understand the subjectivity but there must be a convention that I can implement. My work is theory so I'm not concerned in the details I just want to justify my results and convince others the levels are in principle resolvable. Thank you for the link but this also is talking about angular resolution and I don't see how I can relate it to the question?
Jun
17
asked Resolution of two frequencies
May
11
accepted Derivation of plane wave from inner product of position ket and momentum ket
May
11
accepted Does graphene have a honeycomb lattice?
May
11
accepted Is it physically realistic to have an electric field and polarisation density but no displacement field?
May
11
accepted Multiply creation operator by a phase factor
May
4
asked Multiply creation operator by a phase factor