On the detectability of threefold degeneracies of real Hamiltonians

T. Vértesi, E. Bene

Research output: Article


We investigate real quantum states which are parallel-transported around a triple degeneracy. Applying a recently proposed test [Phys. Rev. Lett. 92 (2004) 060406], it is shown that when none of the states change sign upon completing the circle, the degeneracy is detectable by topological means. Examples from deformed microwave resonators are presented to illustrate the results.

Original languageEnglish
Pages (from-to)363-369
Number of pages7
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number5-6
Publication statusPublished - jan. 24 2005


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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