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Mutually unbiased measurements-induced lower bounds of concurrence

Quantum Physics 2025-04-22 v1

Abstract

We propose a family of lower bounds for concurrence in quantum systems using mutually unbiased measurements, which prove more effective in entanglement estimation compared to existing methods. Through analytical and numerical examples, we demonstrate that these bounds outperform conventional approaches, particularly in capturing finer entanglement features. Additionally, we introduce separability criterions based on MUMs for arbitrary dd-dimensional bipartite systems, the research results show that our criterion has more advantages than the existing criteria.

Keywords

Cite

@article{arxiv.2504.14160,
  title  = {Mutually unbiased measurements-induced lower bounds of concurrence},
  author = {Yu Lu and Meng Su and Zhong-Xi Shen and Hong-Xing Wu and Shao-Ming Fei and Zhi-Xi Wang},
  journal= {arXiv preprint arXiv:2504.14160},
  year   = {2025}
}

Comments

6 pages, 4 figures