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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 (one of the alternative locations)
ISSN: 0295-5075
1286-4854 (Online)
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Copyright: 1998 IOP Publishing Ltd.
Appears in Collections:Research Papers (TP)

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