Monday, Nov 8
1:00 PM -
2:00 PM EDT

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This seminar has been cancelled.

Anatoly Dymarsky (University of Kentucky) will give a hybrid seminar in Room 5209 titled “Persistent breaking of discrete symmetry.”

We show there exist UV-complete field-theoretic models in general dimension, including 2+1, with the spontaneous breaking of a global symmetry, which persists to the arbitrarily high temperatures. Our example is a conformal vector model with the O(N)×ℤ2 symmetry at zero temperature. Using conformal perturbation theory we establish ℤ2 symmetry is broken at finite temperature for N>10. Similar to recent constructions, in the infinite N limit our model has a non-trivial conformal manifold, a moduli space of vacua, which gets deformed at finite temperature. Furthermore, in this regime the model admits a persistent breaking of O(N) in 2+1 dimensions, therefore providing another example where the Coleman-Hohenberg-Mermin-Wagner theorem can be bypassed.

Reference: https://arxiv.org/abs/2106.09723