We investigate three superconducting flux qubits coupled in a loop. In this setup, tripartite entanglement can be created in a natural, controllable, and stable way. Both generic kinds of tripartite entanglement -the W type as well as the GHZ type entanglement- can be identified among the eigenstates. We also discuss the violation of Bell inequalities in this system and show the impact of a limited measurement fidelity on the detection of entanglement and quantum nonlocality.
@article{arxiv.0911.5610,
title = {Efficient creation of multipartite entanglement in flux qubits},
author = {Johannes Ferber and Frank K. Wilhelm},
journal= {arXiv preprint arXiv:0911.5610},
year = {2015}
}
Comments
15 pages, 7 figures; extended sections on coupling strength, system preparation, and entanglement detection