2000/07/04 by F. Pistolesi, Nicola Manini · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Gyrotron and Vacuum Electronics Research #Mechanical and Optical Resonators #cond-mat #quant-ph
paper · pdf · doi:10.1103/physrevlett.85.1585
published as Phys.Rev.Lett.85:1585-1589,2000 · 4 pages, 4 figures. Accepted in Phys. Rev. Lett
arxiv created 2000/07/04 · openalex publication_date 2000/08/21 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In a recent experiment Lauber et al. have deformed cyclically a microwave resonator and have measured the adiabatic normal-mode wave functions for each shape along the path of deformation. The nontrivial observed cyclic phases around a threefold degeneracy were accounted for by Manolopoulos and Child within an approximate theory. However, open-path geometrical phases disagree with experiment. By solving exactly the problem, we find unsuspected extra degeneracies around the multiple one that account for the measured phase changes throughout the path. It turns out that proliferation of additional degeneracies around a multiple one is a common feature of quantum mechanics.