Toolbox for entanglement detection and fidelity estimation
By Otfried Gühne, Chaoyang Lu, Wei-bo Gao, Jian-Wei Pan. 2007
138 citations recorded by the source corpus.
The determination of the state fidelity and the detection of entanglement are fundamental problems in quantum information experiments. We investigate how these goals can be achieved with a minimal effort. We show that the fidelity of Greenberger-Horne-Zeilinger and W states can be determined with an effort increasing only linearly with the number of qubits. We also present simple and robust methods for other states, such as cluster states and states in decoherence-free subspaces.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/918877c0571ea95c765560c98995edb95ded7386
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Entanglement detection (2008, methodology): “N |WN 〉 N−1 N 1− |WN 〉〈WN | 1/N · [1/(1− 1/2 N )] 2N − 1 [8,390] b”
- Experimental demonstration of a hyper-entangled ten-qubit Schr\ (2008, background): “For the cat states, it is sufficient to prove the presence of genuine multipartite entanglement (40,41) if their fidelities exceed the threshold of 0.”