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Published on: June 8, 2018
Teleportation-induced correlated quantum channels
F Caruso1, V Giovannetti, G M Palma
1Institut für Theoretische Physik, Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany.
Physical Review Letters
|April 7, 2010
Summary
Quantum teleportation using entangled qubits can be modeled as a correlated Pauli channel. This study introduces a method to assess quantum channel reliability by examining entanglement properties of the mediating system.
Area of Science:
- Quantum Information Science
- Quantum Communication
- Quantum Entanglement
Background:
- Quantum teleportation typically uses Bell states as entangled resources.
- General bipartite states of 2n qubits can also serve as entangled resources for n-qubit teleportation.
- Correlated Pauli channels describe noise and information degradation in quantum systems.
Purpose of the Study:
- To establish an equivalence between quantum teleportation with general entangled resources and correlated Pauli channels.
- To develop a new method for characterizing these channels using many-body correlation functions.
- To provide a criterion for assessing the reliability of quantum channels in conveying quantum information.
Main Methods:
- Modeling n-qubit teleportation with general bipartite entangled states.
- Characterizing the resulting quantum channel using many-body correlation functions.
- Analyzing the entanglement properties of the mediating quantum system.
Main Results:
- Quantum teleportation with general bipartite entangled states is equivalent to a correlated Pauli channel.
- A new characterization of correlated Pauli channels is derived using many-body correlation functions.
- The entanglement properties of the mediating system directly determine the channel's ability to convey quantum messages.
Conclusions:
- The entanglement properties of the teleportation-mediating system offer a simple method to evaluate quantum channel reliability.
- This framework provides insights into the nature of correlated quantum channels.
- The model is applicable to both discrete and continuous-variable quantum systems.
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