Spin coherent states phenomena probed by quantum state tomography in Zeeman perturbed nuclear quadrupole resonance

Autor(es)

Teles, Joao ^[1] ; Auccaise, Ruben ^[2] ; Rivera-Ascona, Christian ^[3] ; Araujo-Ferreira, Arthur G. ^[3] ; Andreeta, Jose P. ^[3] ; Bonagamba, Tito J. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Ciencias Nat Matemat & Educ, Caixa Postal 153, BR-13600970 Araras, SP - Brazil

^[2] Univ Estadual Ponta Grossa, Dept Fis, Av Carlos Cavalcanti 4748, BR-84030900 Ponta Grossa, PR - Brazil

^[3] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: QUANTUM INFORMATION PROCESSING; v. 17, n. 7 JUL 2018.
• Citações Web of Science: 0

Resumo

Recently, we reported an experimental implementation of quantum information processing (QIP) by nuclear quadrupole resonance (NQR). In this work, we present the first quantum state tomography (QST) experimental implementation in the NQR QIP context. Two approaches are proposed, employing coherence selection by temporal and spatial averaging. Conditions for reduction in the number of cycling steps are analyzed, which can be helpful for larger spin systems. The QST method was applied to the study of spin coherent states, where the alignment-to-orientation phenomenon and the evolution of squeezed spin states show the effect of the nonlinear quadrupole interaction intrinsic to the NQR system. The quantum operations were implemented using a single-crystal sample of KCIO3 and observing (CI)-C-35 nuclei, which posses spin 3/2. (AU)

• Processo FAPESP: 12/02208-5 - Processamento da informação quântica via ressonância magnética nuclear
• Beneficiário: Tito José Bonagamba
• Modalidade de apoio: Auxílio à Pesquisa - Regular