Title:	Geometric phase for a dimerized disordered continuum: Topological shot noise
Authors:	Pradhan, P. Kumar, N.
Issue Date:	Oct-1998
Publisher:	IOP Publishing Ltd.
Citation:	Europhysics Letters, 1998, Vol.44, p131-136
Abstract:	Geometric phase shift associated with an electron propagating through a dimerized disordered continuum is shown to be 0, or ±π (modulo 2π), according to whether the associated circuit traversed in the two-dimensional parameter space excludes, or encircles a certain singularity. This phase shift is a topological invariant. Its discontinuous dependence on the electron energy and disorder implies a statistical spectral and conductance fluctuation in a corresponding mesoscopic system. Inasmuch as the fluctuation derives from the discreteness of the phase shift, it may aptly be called a topological shot noise.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/2653
ISSN:	0295-5075 1286-4854 (Online)
Alternative Location:	http://arxiv.org/abs/cond-mat/9712175 http://dx.doi.org/10.1209/epl/i1998-00446-x
Copyright:	1998 IOP Publishing Ltd.
Appears in Collections:	Research Papers (TP)

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