| Full text | |
| Author(s): |
Guerrero, A. Montana
;
Celis, R. L. Rincon
;
Nussenzveig, P.
;
Martinelli, M.
;
Marino, A. M.
;
Florez, H. M.
Total Authors: 6
|
| Document type: | Journal article |
| Source: | Physical Review Letters; v. 129, n. 16, p. 5-pg., 2022-10-11. |
| Abstract | |
We present the measurement of entanglement between twin beams generated with a doubly resonant optical parameter oscillator (OPO) based on four-wave mixing in hot 85Rb vapor above threshold. This is the first measurement of entanglement in an OPO with a chi o3 thorn media above threshold. We reconstruct the covariance matrix for several configurations and based on a full picture of the four side band mode state, we study entanglement between all possible bipartitions. We show a robust generation of entanglement with stronger generation for a specific pair of modes. For this system, we show that atomic density is a determinant factor for the generation and loss of quantum correlations. The generation of entangled fields with an atomic OPO operating close to atomic resonance of alkali atoms enables a natural integration into quantum networks. (AU) | |
| FAPESP's process: | 17/27216-4 - Studying the quantum state of the field at the threshold of the optical parametric oscillator |
| Grantee: | Alvaro Montaña Guerrero |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 15/18834-0 - Exploring quantum information with atoms, crystals and chips |
| Grantee: | Marcelo Martinelli |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/03155-9 - Implementing four wave mixing technology for entanglement networks, magnetometry and to explore quantum thermodynamics |
| Grantee: | Hans Marin Florez |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |