Maximally entangling tripartite protocols for Josephson phase qubits

作者：Andrei Galiautdinov, John M. Martinis · 发表于：Physical Review A · 年份：2008 · DOI：10.1103/physreva.78.010305 · 被引用次数：32 · 研究领域：Quantum Information and Cryptography、Spectroscopy and Quantum Chemical Studies、Quantum and electron transport phenomena

We introduce a suit of simple entangling protocols for generating tripartite Greenberger-Horne-Zeilinger and W states in systems with anisotropic exchange interaction $g(XX+YY)+\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}ZZ$. An interesting example is provided by macroscopic entanglement in Josephson phase qubits with capacitive $(\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}=0)$ and inductive $(0<\ensuremath{\mid}\stackrel{\ifmmode \tilde{}\else \~{}\fi{}}{g}∕g\ensuremath{\mid}<0.1)$ couplings.