Work

Estimating the concurrence for quantum states via symmetric measurements

Year: 2026

Type: preprint

Abstract: Concurrence is one of the most well-known entanglement measures. We show that, for arbitrary bipartite states, the lower bound of concurrence induced by symmetric measurements is always tighter than the one obtain from realignment. Besides, we derive an extended version of lower bound of concurrence induced by symmetric measurements, which can also be experimentally identified without state tomography, and further present a corresponding lower bound of genuine tripartite entanglement concurrence.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2606.31010

Authors: Wang, Hao-Fan, Zhou, Wen, Chen, Lin, Fei, Shao-Ming

Institutions: Beihang University, Capital Normal University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Awards: G2549854569, G7206151321, G7870695329

OpenAlex ID: W7166831254

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