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seen Jun 18 at 22:56

Jun
17
comment What are the symmetry criteria for continuous phase transitions in Landau theory?
My understanding is that topological phase transitions cannot be described by Landau theory. I'm asking specifically about symmetry criteria in Landau theory, and so I do not expect them to apply to topological transitions.
Jun
17
comment What are the symmetry criteria for continuous phase transitions in Landau theory?
Thanks for your answer. I think that the symmetry criteria I'm thinking of represent necessary but not sufficient conditions, and that they apply only to Landau theory. I've rephrased the question accordingly. As a side note, I think transitions between states of the same symmetry (such as a liquid-gas transition) satisfy the group-subgroup criterion.
Jun
17
revised What are the symmetry criteria for continuous phase transitions in Landau theory?
restricted scope of question to Landau theory
Jun
16
asked What are the symmetry criteria for continuous phase transitions in Landau theory?
Mar
17
awarded  Popular Question
Feb
20
awarded  Popular Question
Jul
24
awarded  Yearling
Jul
24
accepted Physics of weird “boing” sound in racquetball courts?
Jul
23
comment Physics of weird “boing” sound in racquetball courts?
Yes, feel free to add the spectrogram. Here's my MATLAB script for generating it.
Jul
23
comment Physics of weird “boing” sound in racquetball courts?
Thanks for your very detailed analysis! I find this explanation compelling because there is both a high and a low frequency chirp in the simulated sound, just like the recording I posted. I can hear these chirps audibly in the simulated sound and also see them when I plot a spectrogram. I'm wondering if you can say something about whether the position of the source and listener matters? Next time I go to a racquetball court, I'm going to try to reproduce this effect by clapping in order to confirm this explanation and I'm wondering where to stand.
Jul
22
awarded  Nice Question
Jul
20
revised Physics of weird “boing” sound in racquetball courts?
added 12 characters in body
Jul
19
awarded  Critic
Jul
19
revised Physics of weird “boing” sound in racquetball courts?
[Edit removed during grace period]
Jul
19
revised Physics of weird “boing” sound in racquetball courts?
Added spectrograms
Jul
19
asked Physics of weird “boing” sound in racquetball courts?
Jul
2
awarded  Curious
Mar
26
asked Model for a thin metal/semiconductor junction?
Nov
7
revised Is there a phase transition between a gas and plasma?
deleted 3 characters in body; edited tags
Nov
7
revised Is there a phase transition between a gas and plasma?
added 225 characters in body