Maximally entangling tripartite protocols for Josephson phase qubits

2008/04/19 by Andrei Galiautdinov, John M. Martinis · 2 citations
Computer Science · Physics and Astronomy · #Josephson effect #Phase (matter) #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum entanglement #Quantum mechanics #Qubit #Spectroscopy and Quantum Chemical Studies #Superconductivity #quant-ph

paper · pdf · doi:10.1103/physreva.78.010305

6 pages, no figures

arxiv created 2008/04/19 · openalex publication_date 2008/07/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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 \else \~\figZZ. An interesting example is provided by macroscopic entanglement in Josephson phase qubits with capacitive (\stackrel\ifmmode \else \~\fig=0) and inductive (0<\ensuremath|\stackrel\ifmmode \else \~\fig∕g\ensuremath|<0.1) couplings.

Citations

• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• Observation of Quantum Oscillations between a Josephson Phase Qubit and a Microscopic Resonator Using Fast Readout
• Flux qubits and readout device with two independent flux lines
• Quantum-state engineering with Josephson-junction devices
• Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics
• Single-shot measurement of the Josephson charge qubit

Cited by

• Fully connected network of superconducting qubits in a cavity
• Energies and entanglement in multiply-coupled phase qubit systems
• Wireless connection between Josephson qubits