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Sommerfeld Theory Colloquium (ASC)

Chiral symmetry breaking, emergent Higgs mechanism, and critical matter

69 min • 5 februari 2025
The upshot of extensive studies of �uctuations in condensed matter systems is that their qualitative importance is typically con#ned to isolated critical points of continuous transitions between phases of matter. This conventional wisdom also predicts the number of low energy Goldstone modes based on the so-called “G/H” pattern of symmetry breaking. I will discuss a class of systems, some quite wellknown, that violate this standard paradigm. Namely, they exhibit a fewer than “G/H” number of low-energy modes due to an emergent Higgs mechanism. Even more spectacularly, such systems exhibit “critical” ordered phases, with universal power-law properties reminiscent of a critical point, but requiring no #ne-tuning and extending throughout the ordered phase. One exciting recently discovered state is the heliconical nematic that in addition to above phenomena also exhibits spontaneous chiral symmetry breaking.
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