Question
Hugo Duminil-Copin (“DOO-me-nil CO-pan”) was awarded the 2022 Fields Medal in part for showing the continuity of a phase transition in this model. For 10 points each:
[10h] Name this model consisting of spins arranged on an integer lattice. This model was solved analytically by Lars Onsager in two dimensions.
ANSWER: Ising model [or Lenz-Ising model]
[10m] This phenomenon is modeled by the Ising model. Gadolinium and nickel display this phenomenon, which is caused by the alignment of spin states.
ANSWER: ferromagnetism [or ferromagnetic; prompt on magnetism or magnetic]
[10e] Ferromagnetism disappears above a temperature named after a physicist with this surname. A female physicist with this married surname discovered polonium and radium.
ANSWER: Curie [accept Marie Curie or Pierre Curie or Marie Skłodowska–Curie; accept Curie temperature]
<Physics>
Summary
| 2024 ACF Fall at Ohio State | fall | Y | 2 | 10.00 | 100% | 0% | 0% |
| 2024 ACF Fall at Washington | fall | Y | 1 | 20.00 | 100% | 100% | 0% |
| 2024 ACF Fall at Georgia | fall | Y | 1 | 20.00 | 100% | 100% | 0% |
| 2024 ACF Fall at North Carolina | fall | Y | 3 | 16.67 | 100% | 67% | 0% |
| 2024 ACF Fall at Illinois | fall | Y | 10 | 18.00 | 100% | 50% | 30% |
Data
| Chicago A | Purdue B | 10 | 10 | 10 | 30 |
| Chicago B | SIUE | 0 | 0 | 10 | 10 |
| Illinois A | Iowa A | 10 | 10 | 10 | 30 |
| Northwestern B | Illinois B | 10 | 10 | 10 | 30 |
| Illinois C | Iowa B | 0 | 0 | 10 | 10 |
| Northwestern A | Illinois D | 0 | 10 | 10 | 20 |
| Notre Dame B | Notre Dame C | 0 | 0 | 10 | 10 |
| Notre Dame A | Purdue A | 0 | 0 | 10 | 10 |
| Purdue C | WashU B | 0 | 10 | 10 | 20 |
| WashU A | Indiana | 0 | 0 | 10 | 10 |