On the detectability of threefold degeneracies of real Hamiltonians

T. Vértesi, E. Bene

Research output: Contribution to journalArticle

Abstract

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
Volume334
Issue number5-6
DOIs
Publication statusPublished - Jan 24 2005

Keywords

  • Conical intersection
  • Geometric phases
  • Multiple degeneracy
  • Resonators

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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