Localization properties and high-fidelity state transfer in hopping models with correlated disorder

We investigate a tight-binding chain featuring diagonal and off-diagonal disorder, these being modeled through the long-range-correlated fractional Brownian motion. Particularly, by employing exact diagonalization methods, we evaluate how the eigenstate spectrum of the system and how its related sin...

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Bibliographic Details
Published in:Annals of physics 2018-11, Vol.398, p.180-189
Main Authors: Almeida, G.M.A., Mendes, C.V.C., Lyra, M.L., Moura, F.A.B.F. de
Format: Article
Language:English
Subjects:
BROWNIAN MOVEMENT
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Correlated disorder
CORRELATIONS
EIGENSTATES
Localization
PARTICLES
QUANTUM STATES
Quantum-state transfer
SPECTRA
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Summary:We investigate a tight-binding chain featuring diagonal and off-diagonal disorder, these being modeled through the long-range-correlated fractional Brownian motion. Particularly, by employing exact diagonalization methods, we evaluate how the eigenstate spectrum of the system and how its related single-particle dynamics respond to both competing sources of disorder. Moreover, we report the possibility of carrying out efficient end-to-end quantum-state transfer protocols even in the presence of such generalized disorder due to the appearance of extended states around the middle of the band in the limit of strong correlations.
ISSN:0003-4916
1096-035X
DOI:10.1016/j.aop.2018.09.003