High-dimensional entanglement between distant atomic-ensemble memories.
Light Sci Appl
; 5(10): e16157, 2016 Oct.
Article
in En
| MEDLINE
| ID: mdl-30167124
ABSTRACT
Entangled quantum states in high-dimensional space show many advantages compared with entangled states in two-dimensional space. The former enable quantum communication with higher channel capacity, enable more efficient quantum-information processing and are more feasible for closing the detection loophole in Bell test experiments. Establishing high-dimensional entangled memories is essential for long-distance communication, but its experimental realization is lacking. We experimentally established high-dimensional entanglement in orbital angular momentum space between two atomic ensembles separated by 1 m. We reconstructed the density matrix for a three-dimensional entanglement and obtained an entanglement fidelity of (83.9±2.9)%. More importantly, we confirmed the successful preparation of a state entangled in more than three-dimensional space (up to seven-dimensional) using entanglement witnesses. Achieving high-dimensional entanglement represents a significant step toward a high-capacity quantum network.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Light Sci Appl
Year:
2016
Document type:
Article
Affiliation country:
China