Influence of the disorder correlation length on localization and quantum state transference in tight-binding channels

J. D. S. Silva, G. M. A. Almeida, M. L. Lyra and F. A. B. F. de Moura
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J. D. S. Silva: Instituto de Física, Universidade Federal de Alagoas, Maceió, AL 57072-970, Brazil†Centro de Informática, Universidade Federal de Pernambuco, Recife, PE 50740-560, Brazil
G. M. A. Almeida: Instituto de Física, Universidade Federal de Alagoas, Maceió, AL 57072-970, Brazil
M. L. Lyra: Instituto de Física, Universidade Federal de Alagoas, Maceió, AL 57072-970, Brazil
F. A. B. F. de Moura: Instituto de Física, Universidade Federal de Alagoas, Maceió, AL 57072-970, Brazil

International Journal of Modern Physics C (IJMPC), 2024, vol. 35, issue 11, 1-12

Abstract: We investigate in detail the transference of quantum states in a disordered channel. We consider a one-dimensional tight-binding model consisting of a source S connected to a receiver R throughout a disordered channel. The disorder distribution contains a single tunable spatial correlation length. We demonstrate that the disorder correlation length plays a relevant role within the localization properties of the channel. The hopping parameter between the sites S and R and the channel are also adjustable parameters. We investigate the possibility of transference of quantum states along this quantum channel model and describe the optimal conditions for the occurrence of a high fidelity process.

Keywords: Tight-binding model; correlated disorder; localization (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1142/S0129183124501444

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