Cascading Multicriticality in Nonrelativistic Spontaneous Symmetry Breaking
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Without Lorentz invariance, spontaneous global symmetry breaking can lead to multicritical Nambu-Goldstone modes with a higher-order low-energy dispersion $\omega\sim k^n$ ($n=2,3,\ldots$), whose naturalness is protected by polynomial shift symmetries. Here we investigate the role of infrared divergences and the nonrelativistic generalization of the Coleman-Hohenberg-Mermin-Wagner (CHMW) theorem. We find novel cascading phenomena with large hierarchies between the scales at which the value of $n$ changes, leading to an evasion of the "no-go" consequences of the relativistic CHMW theorem.
Originalsprog | Engelsk |
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Tidsskrift | Physical Review Letters |
ISSN | 0031-9007 |
DOI | |
Status | Udgivet - 24 jul. 2015 |
Eksternt udgivet | Ja |
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