Continuous Variable Entanglement in an Optical Parametric Oscillator Based on a Nondegenerate Four Wave Mixing Process in Hot Alkali Atoms

Autor(es)

Guerrero, A. Montana ; Celis, R. L. Rincon ; Nussenzveig, P. ; Martinelli, M. ; Marino, A. M. ; Florez, H. M.

• Tipo de documento: Artigo Científico
• Fonte: Physical Review Letters; v. 129, n. 16, p. 5-pg., 2022-10-11.

Resumo

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)

• Processo FAPESP: 17/27216-4 - Investigando o comportamento quântico do campo no limiar do oscilador paramétrico ótico
• Beneficiário: Alvaro Montaña Guerrero
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/18834-0 - Explorando informação quântica com átomos, cristais e chips
• Beneficiário: Marcelo Martinelli
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 18/03155-9 - Implementação da tecnologia de mistura de quatro ondas em redes de emaranhamento, magnetometria e para explorar a termodinâmica quântica
• Beneficiário: Hans Marin Florez
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado