Controllable manipulation and entanglement of macroscopic quantum states in coupled charge qubits

2003/06/30 by J. Q. You, J. S. Tsai, Franco Nori · 3 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat.mes-hall #cond-mat.supr-con #quant-ph

paper · pdf · doi:10.1103/physrevb.68.024510

published as Phys. Rev. B 68, 024510 (2003) · 8 pages, 4 figures

openalex publication_date 2003/07/22 · arxiv created 2003/09/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present an experimentally implementable method to couple Josephson charge qubits and to generate and detect macroscopic entangled states. A large-junction superconducting quantum interference device is used in the qubit circuit for both coupling qubits and implementing the readout. Also, we explicitly show how to achieve a microwave-assisted macroscopic entanglement in the coupled-qubit system.

Citations

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Scalable Quantum Computing with Josephson Charge Qubits
• Josephson-junction qubits with controlled couplings
• Quantum-state engineering with Josephson-junction devices

Cited by

• Macroscopic Einstein-Podolsky-Rosen pairs in superconducting circuits
• Efficient one-step generation of large cluster states with solid-state circuits
• Switchable coupling between charge and flux qubits