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Quantum information and relativity: harvesting entanglement in different setups

Ota, Iara Naomi Nobre

Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Instituto de Física de São Carlos 2018-07-31

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  • Título:
    Quantum information and relativity: harvesting entanglement in different setups
  • Autor: Ota, Iara Naomi Nobre
  • Orientador: Vanzela, Daniel Augusto Turolla
  • Assuntos: Colheita De Emaranhamento; Emaranhamento; Teoria Quântica De Campos No Espaço-Tempo Curvo; Entanglement; Harvesting Entanglement; Quantum Field Theory In Curved Spacetime
  • Notas: Dissertação (Mestrado)
  • Descrição: The aim of this work is present the phenomenon denoted entanglement harvesting. We begin by introducing entanglement historically. Following, we go beyond the one particle theory in flat spacetime and introduce Quantum Field Theory in Curved Spacetime, showing two famous consequences: the Unruh effect and the Hawking radiation. Finally, we analyze entanglement harvesting for two Unruh-deWitt detectors. In the fisrt example, we see that there is a \"sudden death\" point of entanglement harvesting when the detectors are near the BTZ black hole event horizon, due to redshift effect and Hawking radiation. Then, we compare the phenomenon for different scenarios, and find out that it is sensitive to the structure of spacetime. Finally, we see how detectors\' parameters affect it and find out that the smoothness of the switching of the detectors\' coupling to the field is extremely relevant. We also see how the parameters can be used to optimize entanglement harvested.
  • DOI: 10.11606/D.76.2018.tde-02102018-093613
  • Editor: Biblioteca Digital de Teses e Dissertações da USP; Universidade de São Paulo; Instituto de Física de São Carlos
  • Data de criação/publicação: 2018-07-31
  • Formato: Adobe PDF
  • Idioma: Inglês

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