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PreprintarXiv licencearXiv

Estimating the concurrence for quantum states via symmetric measurements

  • Hao-Fan Wang
  • Wen Zhou
  • Lin Chen
  • Shao-Ming Fei
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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.

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Cite

BibTeXRIS
BibTeX
@misc{wang2026estimating,
  title = {{Estimating the concurrence for quantum states via symmetric measurements}},
  author = {Hao-Fan Wang and Wen Zhou and Lin Chen and Shao-Ming Fei},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.31010},
  eprint = {2606.31010},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.31010},
}
RIS
TY  - UNPB
TI  - Estimating the concurrence for quantum states via symmetric measurements
AU  - Hao-Fan Wang
AU  - Wen Zhou
AU  - Lin Chen
AU  - Shao-Ming Fei
PY  - 2026
DA  - 2026/10/17
PB  - arXiv
DO  - 10.48550/arxiv.2606.31010
UR  - https://arxiv.org/abs/2606.31010
AB  - 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.
ER  -