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Quantum Algorithms
Channel Activation of CHSH Nonlocality
arXiv
Authors: Yujie Zhang, Rodrigo Araiza Bravo, Virginia O. Lorenz, Eric Chitambar
Year
2019
Paper ID
14791
Status
Preprint
Abstract Read
~2 min
Abstract Words
85
Citations
N/A
Abstract
Quantum channels that break CHSH nonlocality on all input states are known as CHSH-breaking channels. In quantum networks, such channels are useless for distributing correlations that can violate the CHSH Inequality. Motivated by previous work on activation of nonlocality in quantum states, here we demonstrate an analogous activation of CHSH-breaking channels. That is, we show that certain pairs of CHSH-breaking channels are no longer CHSH-breaking when used in combination. We find that this type of activation can emerge in both uni-directional and bi-directional communication scenarios.
Why This Paper Matters
- It adds a 2019 reference point for readers tracking recent quantum research.
- Quantum channels that break CHSH nonlocality on all input states are known as CHSH-breaking channels.
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