Entanglement in prepare-and-measure scenarios: many questions, a few answers

نویسندگان

چکیده

Abstract Entanglement and quantum communication are paradigmatic resources in information science leading to correlations between systems that have no classical analogue. Correlations due entanglement when is absent for long been studied Bell scenarios. extensively prepare-and-measure (PM) scenarios the last decade. Here, we set out understand investigate involve both communication, focussing on entanglement-assisted (EA) PM In a recent companion paper (arXiv: 2103.10748 ), investigated based unrestricted entanglement. our focus with restricted We establish several elementary relations standard their EA counterparts. particular, while it was already known bits or qubits assisted by two-qubit sender receiver constitute stronger resource than bare qubits, show higher-dimensional further enhance power of qubits. also provide characterisation generalised dense coding protocols, natural subset finding they can be understood as protocols real-valued Hilbert space. Though such convey up two information, evidence, perhaps counter-intuitively, small capacity, qutrits, sometimes produce correlations. Along way leave conjectures conclude list interesting open problems.

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ژورنال

عنوان ژورنال: New Journal of Physics

سال: 2022

ISSN: ['1367-2630']

DOI: https://doi.org/10.1088/1367-2630/ac724a