One-way Einstein-Podolsky-Rosen steering beyond qubits

Qiang Zeng (曾强)
Phys. Rev. A 106, 032202 – Published 2 September 2022

Abstract

Quantum steering has been exploited as an important resource in modern quantum information processing. Owing to its directional nature, some quantum states that are asymmetric under the exchange of parties have been found to manifest steering only in a specific direction, thus called one-way steering. Existing works focused on one-way steering in systems of qubits. Here we propose a family of two-party states that are one-way steerable in systems of d dimensions. In particular, we validate the one-way steerability of the states for d=3, and demonstrate how one-way steering parameter space manifests in a two-qutrit system. A general numerical approach for characterizing higher-dimensional one-way steering is provided. Moreover, we develop a method to characterize one-way steering with the experimental loss taken into account, with which the trade-off relation between losses and measurement settings in a steering test in higher-dimensional system is investigated. Our loss-counted model works for finite-dimensional systems with finite measurement settings.

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  • Received 6 February 2022
  • Revised 22 July 2022
  • Accepted 19 August 2022

DOI:https://doi.org/10.1103/PhysRevA.106.032202

©2022 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyGeneral Physics

Authors & Affiliations

Qiang Zeng (曾强)*

  • Beijing Academy of Quantum Information Sciences, Beijing 100193, China; Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement of Ministry of Education, School of Physics, Beijing Institute of Technology, Beijing 100081, China; and Centre for Quantum Computation and Communication Technology (Australian Research Council), Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia

  • *zengqiang@baqis.ac.cn

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Issue

Vol. 106, Iss. 3 — September 2022

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