Influence of a Superconducting Lead on Orbital Entanglement Production in Chaotic Cavities

Autor(es)

Rodriguez-Perez, Sergio ^[1] ; Novaes, Marcel ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio Grande do Norte, Escola Ciencias & Tecnol, BR-59072970 Natal, RN - Brazil

^[2] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Physics; v. 45, n. 5, p. 532-537, OCT 2015.
• Citações Web of Science: 1

Resumo

We study orbital entanglement production in a chaotic cavity connected to four single-channel normal-metal leads and one superconducting lead, assuming the presence of time-reversal symmetry and within a random matrix theory approach. The scattered state of two incident electrons is written as the superposition of several two-outgoing quasi-particle components, four of which are orbitally entangled in a left-right bipartition. We calculate numerically the mean value of the squared norm of each entangled component, as functions of the number of channels in the superconducting lead. Its behavior is explained as resulting from the proximity effect. We also study statistically the amount of entanglement carried by each pair of outgoing quasi-particles. When the influence of the superconductor is more intense, the device works as an entangler of electron-hole pairs, and the average entanglement is found to be considerably larger than that obtained without the superconducting lead. (AU)

• Processo FAPESP: 11/07362-0 - Caos, Supercondutividade e Emaranhamento Quântico
• Beneficiário: Sergio Rodríguez Pérez
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado