Generating highly entangled states via discrete-time quantum walks with Parrondo sequences

Dinesh Kumar Panda, B. Varun Govind and Colin Benjamin

Physica A: Statistical Mechanics and its Applications, 2022, vol. 608, issue P1

Abstract: Quantum entanglement has multiple applications in quantum information processing. Developing methods to generate highly entangled states independent of initial conditions is an essential task. Herein we aim to generate highly entangled states via discrete-time quantum walks. We propose deterministic Parrondo sequences that generate states that are generally much more entangled than states produced by sequences using only one of the two coins. We show that some Parrondo sequences generate highly entangled states, which are independent of the phase of the initial state used and further lead to maximally entangled states in some cases. We study Parrondo sequences for a small number of time steps and the asymptotic limit of a large number of time steps.

Keywords: Quantum Walks; Entanglement; Single-particle; Parrondo; Schmidt norm; Optimal (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:608:y:2022:i:p1:s0378437122008147

DOI: 10.1016/j.physa.2022.128256

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