Finding Out All Locally Indistinguishable Sets Of Generalized Bell States

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Jiang-Tao Yuan^1,2, Ying-Hui Yang², and Cai-Hong Wang^1,2

¹College of Science, Wuxi University, Wuxi, 214105, China
²School of Mathematics and Information Science, Henan Polytechnic University, Jiaozuo, 454000, China

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Abstract

In general, for a bipartite quantum system $mathbb{C}^{d}otimesmathbb{C}^{d}$ and an integer $k$ such that $4leq kle d$,there are few necessary and sufficient conditions for local discrimination of sets of $k$ generalized Bell states (GBSs) and it is difficult to locally distinguish $k$-GBS sets.The purpose of this paper is to completely solve the problem of local discrimination of GBS sets in some bipartite quantum systems.Firstly three practical and effective sufficient conditions are given,Fan$^{,}$s and Wang et al.$^{,}$s results [Phys Rev Lett 92, 177905 (2004); Phys Rev A 99, 022307 (2019)] can be deduced as special cases of these conditions.Secondly in $mathbb{C}^{4}otimesmathbb{C}^{4}$, a necessary and sufficient condition for local discrimination of GBS sets is provided, and a list of all locally indistinguishable 4-GBS sets is provided,and then the problem of local discrimination of GBS sets is completely
$mathbb{C}^{5}otimesmathbb{C}^{5}$, a concise necessary and sufficient condition for one-way local discrimination of GBS sets is obtained,which gives an affirmative answer to the case $d=5$ of the problem proposed by Wang et al.

► BibTeX data

@article{Yuan2022findingoutall, doi = {10.22331/q-2022-07-14-763}, url = {https://doi.org/10.22331/q-2022-07-14-763}, title = {Finding out all locally indistinguishable sets of generalized {B}ell states}, author = {Yuan, Jiang-Tao and Yang, Ying-Hui and Wang, Cai-Hong}, journal = {{Quantum}}, issn = {2521-327X}, publisher = {{Verein zur F{“{o}}rderung des Open Access Publizierens in den Quantenwissenschaften}}, volume = {6}, pages = {763}, month = jul, year = {2022} }

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Cited by

[1] Mao-Sheng Li, Fei Shi, and Yan-Ling Wang, “Local discrimination of generalized Bell states via commutativity”, Physical Review A 105 3, 032455 (2022).

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