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Expected number of quantum channels in quantum networks
Xi Chen1, He-Ming Wang1, Dan-Tong Ji2
1School of Physics, Peking University, Beijing 100871, China.
Scientific Reports
|July 16, 2015
Summary
We propose the expected number of quantum channels (ENQC) to measure quantum communication efficiency in quantum networks. ENQC quantifies teleported information and can be enhanced via entanglement swapping.
Area of Science:
- Quantum Information Science
- Quantum Communication Networks
Background:
- Quantum communication is crucial for quantum information processing.
- Existing measures do not fully capture the consumption of quantum channels during teleportation.
Purpose of the Study:
- To introduce a novel metric, the expected number of quantum channels (ENQC), for quantifying quantum communication efficiency in quantum networks.
- To analyze the properties and enhancement strategies for ENQC.
Main Methods:
- Defining ENQC as a measure of transferable quantum information.
- Demonstrating ENQC's relationship to local correlations and effective communication circles.
- Investigating the impact of network topology and entanglement swapping on ENQC.
Main Results:
- ENQC quantifies the amount of quantum information that can be teleported, accounting for channel consumption.
- ENQC is independent of distance between nodes if their communication circles do not overlap.
- Network transformations, such as entanglement swapping, can enhance ENQC.
Conclusions:
- The expected number of quantum channels provides a valuable metric for quantum network efficiency.
- ENQC offers insights into the spatial and topological aspects of quantum communication.
- Entanglement swapping presents a viable method for improving quantum communication capacity in networks.
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