MiS Preprint Repository
We have decided to discontinue the publication of preprints on our preprint server end of 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV (www.arxiv.org) that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.
Local Unitary Equivalence of Multi-qubit Mixed Quantum States
Ming Li, Ting-Gui Zhang, Shao-Ming Fei, Xianqing Li-Jost and Naihuan JingAbstract
We present computable criterion for completely classifying multi-qubit quantum states under local unitary operations. The criterion can be used to detect whether two quantum states in multi-qubit systems are local unitary equivalent or not. Once obtaining the positive answer, we are further able to compute the corresponding unitary operators precisely. Since the scheme is based on the mean values of some quantum mechanical observables, it supplies an experimental way to judge the local equivalence of quantum states.
- Received:
- 19.08.14
- Published:
- 20.08.14
- PACS:
- 03.67.-a, 02.20.Hj, 03.65.-w