Tuning quantum discord in Josephson charge qubits system

2014/05/20 by Bo-xing Shang, Shang, Bo-xing, Xi-qiang Xi +1
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #quant-ph

paper · pdf · doi:10.48550/arxiv.1405.5002

5 pages, 5 figures. arXiv admin note: text overlap with arXiv:cond-mat/0306209 by other authors

arxiv created 2014/05/22 · arxiv updated 2014/05/23

Abstract

A type of two qubits Josephson charge system is constructed in this paper, and properties of the quantum discord (QD) as well as the differences between thermal QD and thermal entanglement were investigated. A detailed calculation shows that the magnetic flux Φ_Xk is more efficient than the voltage V_Xi in tuning QD. By choosing proper system parameters, one can realize the maximum QD in our two qubits Josephson charge system.

Citations

• Scalable Quantum Computing with Josephson Charge Qubits

Related

• Creating quantum discord through local generalized amplitude damping
• Quantum information processing and multi-qubit entanglement with Josephson-junction charge qubits in a thermal cavity
• Thermal and Magnetic Quantum Discord in Heisenberg models
• Thermal quantum discord in the anisotropic Heisenberg XXZ model with the Dzyaloshinskii-Moriya interaction
• Quantum holonomies with Josephson-junction devices