| Full text | |
| Author(s): |
Rosario, Pedro
;
Santos, Alan C.
;
Piovella, Nicola
;
Kaiser, Robin
;
Cidrim, Andre
;
Bachelard, Romain
Total Authors: 6
|
| Document type: | Journal article |
| Source: | Physical Review Letters; v. 133, n. 5, p. 7-pg., 2024-07-31. |
| Abstract | |
To address the outstanding task of detecting entanglement in large quantum systems, entanglement witnesses have emerged, addressing the separable nature of a state. Yet optimizing witnesses, or accessing them experimentally, often remains a challenge. We here introduce a family of entanglement witnesses for open quantum systems. Based on the electric field, it does not require state tomography or single-site addressing, but rather macroscopic measurements of the field quadratures and of the total fluorescence. Its efficiency is demonstrated by detecting, from almost any direction, the entanglement of collective singlephoton states, such as long-lived states generated by cooperative spontaneous emission. Able to detect entanglement in large open quantum systems, and through a single continuous measurement if operating in the stationary regime, these electric-field-based witnesses can be used on any set of emitters described by the Pauli group, such as atomic systems (cold atoms and trapped ions), giant atoms, color centers, and superconducting qubits. (AU) | |
| FAPESP's process: | 22/12382-4 - Localization in superconducting circuits |
| Grantee: | Pedro Pablo Rosario Vargas |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 23/03300-7 - Localization of Light: Anderson and beyond |
| Grantee: | Romain Pierre Marcel Bachelard |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 19/12842-2 - Cooperative stochastic heating and optical binding with cold atoms |
| Grantee: | Romain Pierre Marcel Bachelard |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 23/07463-8 - Quantum control of trapped Rydberg ions |
| Grantee: | André Cidrim Santos |
| Support Opportunities: | Scholarships in Brazil - Generation Project |
| FAPESP's process: | 19/13143-0 - Cold atoms, photons, and quantum correlations |
| Grantee: | Celso Jorge Villas-Bôas |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 22/06449-9 - Quantum control of trapped Rydberg ions |
| Grantee: | André Cidrim Santos |
| Support Opportunities: | Generation Project Research Grant |
| FAPESP's process: | 18/15554-5 - Transport and localization of light in two and three dimensions |
| Grantee: | Romain Pierre Marcel Bachelard |
| Support Opportunities: | Research Grants - Young Investigators Grants - Phase 2 |