Blaschke-term interpretation of multiple-π geometric phases

R. Englman, T. Vértesi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We consider a general slowly (adiabatically) moving system represented by a two-component wave function. Variation in the slowness of motion along the trajectory can result in (odd) multiple-π jumps in the geometric phase, in place of the usual ±π phases. These large multiple phase jumps have recently been obtained by simulation of molecular trajectories. By deriving a perturbational solution, exact in the adiabatic limit, we here quantitatively equate them with the relative decrease of the speed of motion at the instant of the jump. These jumps are further identified with Blaschke terms in the Hilbert transform expression for the time (t) dependent phase, terms that arise in the ground state from wave-function-zeros in the lower half of the complex t-plane.

Original languageEnglish
Pages (from-to)196-199
Number of pages4
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume354
Issue number3
DOIs
Publication statusPublished - May 29 2006

Keywords

  • Adiabatic motion
  • Berry phase
  • Dispersion relations
  • Hilbert transform
  • Molecules

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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