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Entanglement Distribution By Separable States

TabeBordbar, Najmeh | 2017

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 50423 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Karimipour, Vahid; Memarzadeh Esfahani, Laleh
  7. Abstract:
  8. Entanglement is a type of quantum correlations which due to its unique features plays a crucial role in quantum information processing. Hence trying to find new approaches in entanglement generation, distribution and also presenting strategies to optimize these processes by considering the fragility of entanglement, is always one of the most important initial steps in many quantum information processes. In this thesis we provide a systematic method to distribute entanglement by separable states and by means of separable ancilla during the process. It is worth mentioning that having separable ancilla during the process of entanglement distribution leads to more robustness against noise to some extent and because of the fragility of entanglement it is important to have more robust protocol against noise. At first we present a method in order to distribute d-level Bell state. Due to the fact that multipartite entangled states are one of the most important physical resource for quantum computations and implementation numerous quantum information protocols like secret sharing and networked cryptographic conferencing, in our next step we present a method for GHZ distribution between many parties. It should be noted that special features of entanglement in GHZ state make it a noticeable candidate for our multipartite quantum information protocols. Finally we investigate noise effects on the performance of entanglement distribution by separable state
  9. Keywords:
  10. Entanglement ; Quantum Noise ; Entanglement Generation ; Entanglement Distribution ; Separable Ancilla ; D-Dimentional Bell Stak ; Quantum Communication Channel ; Greenberger-Horne-Zeilinger (GHZ)

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