| Texto completo | |
| Autor(es): |
de Brito, V, F. C.
;
da Paz, I. G.
[1]
;
Hiller, Brigitte
[2]
;
Araujo, Jonas B.
[3]
;
Sampaio, Marcos
[4]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] de Brito, F. C., V, Univ Fed Piaui, Dept Fis, Campus Minist Petronio Portela, BR-64049550 Teresina, PI - Brazil
[2] Univ Coimbra, CFisUC Dept Phys, P-3004516 Coimbra - Portugal
[3] Univ Sao Paulo, Inst Fis, Dept Fis Matemat, CP 66-318, BR-05315970 Sao Paulo, SP - Brazil
[4] de Brito, F. C., V, Univ Fed ABC, Dept Fis, Sao Paulo, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physics Letters A; v. 386, JAN 18 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
We consider a double Gaussian approximation to describe the wavefunction of twin photons (also called a biphoton) created in a nonlinear crystal via a type-I spontaneous parametric downconversion (SPDC) process. We find that the wavefunction develops a Gouy phase while it propagates, being dependent of the two-photon correlation through the Rayleigh length. We evaluate the covariance matrix and show that the logarithmic negativity, useful in quantifying entanglement in Gaussian states, although Rayleigh-dependent, does not depend on the propagation distance. In addition, we show that the two-photon entanglement can be connected to the biphoton Gouy phase as these quantities are Rayleigh-length-related. Then, we focus the double Gaussian biphoton wavefunction using a thin lens and calculate a Gouy phase that is in reasonable agreement with the experimental data of D. Kawase et al. published in Ref. {[}1]. (C) 2020 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 18/05948-6 - Aspectos perturbativos e não perturbativos em teoria quântica de campos e informação quântica relativística |
| Beneficiário: | Marcos Donizeti Rodrigues Sampaio |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |