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PT Symmetric Aubry-Andre Model

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arxiv 1402.2749 v1 pith:DYASYJPM submitted 2014-02-12 quant-ph

classification quant-ph
keywords aubry-andregainlossmodelspectrumsymmetricalmostarray
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PT symmetric Aubry-Andre model describes an array of N coupled optical waveguides with position dependent gain and loss. We show that the reality of the spectrum depends sensitively on the degree of disorder for small number of lattice sites. We obtain the Hofstadter Butterfly spectrum and discuss the existence of the phase transition from extended to localized states. We show that rapidly changing periodical gain/loss materials almost conserves the total intensity.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Mobility edges in pseudo-unitary quasiperiodic quantum walks

    quant-ph 2024-11 unverdicted novelty 7.0 of 10

    A pseudo-unitary quasiperiodic quantum walk model exhibits a novel mobility edge sharply dividing metallic and insulating phases plus a second transition unique to discrete time, with PT-symmetry breaking quantified b...

  2. Observation of Metal-Insulator and Spectral Phase Transitions in Aubry-Andr\'e-Harper Models

    quant-ph 2025-08 conditional novelty 6.0 of 10

    A single-photon quantum-walk experiment realizes the unitary almost-Mathieu operator and observes metal-insulator, parity-time symmetry-breaking, and all-imaginary-quasienergy spectral transitions.

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