Observable Dirac-type singularities in Berry's phase and the monopole
Quantum Physics
2009-11-07 v1
Abstract
The physical reality and observability of 2n\pi Berry phases, as opposed to the usually considered modulo 2\pi topological phases is demonstrated with the help of computer simulation of a model adiabatic evolution whose parameters are varied along a closed loop in the parameter space. Using the analogy of Berry's phase with the Dirac monopole, it is concluded that an interferometer loop taken around a magnetic monopole of strength n/2 yields an observable 2n\pi phase shift, where n is an integer. An experiment to observe the effect is proposed.
Cite
@article{arxiv.quant-ph/0111123,
title = {Observable Dirac-type singularities in Berry's phase and the monopole},
author = {Rajendra Bhandari},
journal= {arXiv preprint arXiv:quant-ph/0111123},
year = {2009}
}
Comments
12 pages Latex, 3 postscript figures; submitted to Physical Review Letters 15 September 2000; revised 19 November 2001