Unexpected phase-jumps upon cycling around a conical intersection

R. Englman, A. Yahalom, T. Vértesi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A non-mathematical formulation is given of possible multiple (not just ±π) geometric phase-jumps around conical intersections. It is based on variable cycling speed along the nuclear trajectory and on a rigorous handling of the adiabatic limit. Extremely high value π jumps occur even for a single conical intersection, if the trajectory starts near the degeneracy point.

Original languageEnglish
Pages (from-to)20-23
Number of pages4
JournalJournal of Molecular Structure
Issue number1-3
StatePublished - 16 Jul 2007


  • Adiabatic motion
  • Berry phase
  • Molecules


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