Entanglement is a very useful phenomenon for quantum information processes. When more than one degree of freedom (DOF) is entangled, the hyperentanglement is realized. The main advantage of hyperentanglement is that of being able to encode a greater amount of information by exploiting the quantum coherence. This advantage is due to the fact that it is possible to extract information for each DOF. We propose to model a hyperentangled state through copies of a Bell state and evaluate its functionality transferring a quantum state through a classical channel. The goal is to simulate the transport of a hyperentangled state through a classical channel in the presence of a system-environment interaction. By virtue of an increased Hilbert space following the increase in the DOF, the entanglement quantifier, the so called concurrence, decays slower with the distance compared to the case of one DOF.

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Modelling Hyperentanglement for Quantum Information Processes

  • Luca Salatino,
  • Luca Mariani,
  • Carmine Attanasio,
  • Sergio Pagano,
  • Roberta Citro

摘要

Entanglement is a very useful phenomenon for quantum information processes. When more than one degree of freedom (DOF) is entangled, the hyperentanglement is realized. The main advantage of hyperentanglement is that of being able to encode a greater amount of information by exploiting the quantum coherence. This advantage is due to the fact that it is possible to extract information for each DOF. We propose to model a hyperentangled state through copies of a Bell state and evaluate its functionality transferring a quantum state through a classical channel. The goal is to simulate the transport of a hyperentangled state through a classical channel in the presence of a system-environment interaction. By virtue of an increased Hilbert space following the increase in the DOF, the entanglement quantifier, the so called concurrence, decays slower with the distance compared to the case of one DOF.