Weak values in collision theory

Autor(es)

de Castro, Leonardo Andreta ^[1] ; Brasil, Carlos Alexandre ^[1] ; Napolitano, Reginaldo de Jesus ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANNALS OF PHYSICS; v. 392, p. 272-286, MAY 2018.
• Citações Web of Science: 1

Resumo

Weak measurements have an increasing number of applications in contemporary quantum mechanics. They were originally described as a weak interaction that slightly entangled the translational degrees of freedom of a particle to its spin, yielding surprising results after post-selection. That description often ignores the kinetic energy of the particle and its movement in three dimensions. Here, we include these elements and re-obtain the weak values within the context of collision theory by two different approaches, and prove that the results are compatible with each other and with the results from the traditional approach. To provide a more complete description, we generalize weak values into weak tensors and use them to provide a more realistic description of the Stern-Gerlach apparatus. (C) 2018 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 18/00796-3 - Processamento de Informação Quântica sob os Auspícios do Formalismo da Matriz de Espalhamento
• Beneficiário: Reginaldo de Jesus Napolitano
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/19848-4 - Influência do tempo de medida em fenômenos relacionados à informação quântica
• Beneficiário: Carlos Alexandre Brasil
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado