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- Title
The Linear Optical Unambiguous Discrimination of Hyperentangled Bell States Assisted by Time Bin.
- Authors
Gao, Cheng‐Yan; Ren, Bao‐Cang; Zhang, Yuan‐Xia; Ai, Qing; Deng, Fu‐Guo
- Abstract
A linear optical unambiguous discrimination of hyperentangled Bell states is proposed for two‐photon systems entangled in both the polarization and momentum degrees of freedom (DOFs) assisted by time bin. This unambiguous discrimination scheme can completely identify 16 orthogonal hyperentangled Bell states using only linear optical elements, where the function of the auxiliary entangled Bell state is replaced by time bin. Moreover, the possibility of extending this scheme for distinguishing hyperentangled Bell states in n DOFs is discussed, and it shows that 2n+k+1 hyperentangled Bell states in n (n≥2) DOFs can be distinguished with k (k<n) auxiliary entangled states of additional DOFs by introducing a time delay, which decreases the auxiliary entanglement resource required for unambiguous discrimination of hyperentangled Bell state. Therefore, this scheme provides a new way for distinguishing hyperentangled states with current technology, which will extend the application of discrimination of hyperentangled states via linear optics to other quantum information protocols besides hyperdense coding schemes in the future.
- Subjects
QUANTUM optics; BELLS; OPTICAL elements; DEGREES of freedom; BELL helicopters
- Publication
Annalen der Physik, 2019, Vol 531, Issue 10, pN.PAG
- ISSN
0003-3804
- Publication type
Article
- DOI
10.1002/andp.201900201