Rabi transport and the other finite-size effects in one-dimensional discrete-time topological quantum walk

• URL: http://arxiv.org/abs/2506.19523v2
• Date: Mon, 30 Jun 2025 15:02:07 GMT
• Title: Rabi transport and the other finite-size effects in one-dimensional discrete-time topological quantum walk
• Authors: Andrzej Grudka, Marcin Karczewski, Paweł Kurzyński, Tomasz P. Polak, Jan Wójcik, Antoni Wójcik,
• Abstract summary: We show the emergence of localized states at boundaries between topologically distinct phases in one-dimensional quantum walks.<n>For finite lattices, we show that topology induces localized and bilocalized states, leading to Rabi-like transport as a result of degeneracy breaking due to finite-size effects.
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• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: This paper investigates Rabi transport and finite-size effects in one-dimensional discrete-time topological quantum walks. We demonstrate the emergence of localized states at boundaries between topologically distinct phases and analyze how finite system sizes influence quantum walk dynamics. For finite lattices, we show that topology induces localized and bilocalized states, leading to Rabi-like transport as a result of degeneracy breaking due to finite-size effects. The study bridges the gap between topological protection and size-dependent dynamics, revealing transitions from ballistic motion to localized or oscillatory behavior based on the system's topological properties. Analytical and numerical methods are employed to explore the spectra and dynamics of quantum walks, highlighting the robustness of Rabi transport against disorder. The findings provide insights into controlled quantum transport and potential applications in quantum information processing.

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