Undergrad Phase transitions university classes

Click For Summary
The discussion centers on the concept of second order phase transitions and their classification into universality classes. Participants clarify that "university classes" likely refers to "universality classes," which categorize phase transitions based on critical behavior. The inquiry includes whether the number of second order phase transition universality classes is known and if the electroweak phase transition is classified as second order. A link to Wikipedia is provided for further reading on critical exponents and universality classes. Overall, the conversation emphasizes the need for clarity in terminology related to phase transitions.
Carlos L. Janer
Messages
114
Reaction score
3
There's something that I'd like to know and haven't been able to find in any book:

1.- Is the number of second order phase transition university classes known?

2.- Do we know quantitatively know the behavior of all such second order phase transition university classes?

3.- Do we know the university class the electroweak phase transition belongs to? I'm assuming, perhaps
incorrectly, that this Universe phase transition was second order.

Any insight regarding any of these three questions will be much appreciated.

Thanks in advance,

Carlos.
 
Physics news on Phys.org
What do you mean by "university classes"? I recognize the term "second order phase transition" but not "second order phase transition university classes." A Google search for that phrase didn't find anything. Perhaps this is a problem with translation from Spanish (I guess)?
 
Hi there!

Thanks for the post. This is not a translation problem. Please, go to https://en.wikipedia.org/wiki/Phase_transition and then to
Critical exponents and universality classes. The subject is pretty well explained at the end of this section.

Thanks again,

Carlos.
 
Thread 'Unexpected irregular reflection signal from a high-finesse cavity'
I am observing an irregular, aperiodic noise pattern in the reflection signal of a high-finesse optical cavity (finesse ≈ 20,000). The cavity is normally operated using a standard Pound–Drever–Hall (PDH) locking configuration, where an EOM provides phase modulation. The signals shown in the attached figures were recorded with the modulation turned off. Under these conditions, when scanning the laser frequency across a cavity resonance, I expected to observe a simple reflection dip. Instead...

Similar threads

  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 29 ·
Replies
29
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 22 ·
Replies
22
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 34 ·
2
Replies
34
Views
5K
Replies
1
Views
778