Scalable Quantum Computing with Josephson Charge Qubits

2002/10/21 by J. Q. You, Jaw-Shen Tsai, J. S. Tsai +1 · 17 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/physrevlett.89.197902

published as Phys. Rev. Lett. 89, 197902 (2002) · 4 pages, 2 figures

openalex publication_date 2002/10/21 · arxiv created 2003/06/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A goal of quantum information technology is to control the quantum state of a system, including its preparation, manipulation, and measurement. However, scalability to many qubits and controlled con-nectivity between any selected qubits are two of the major stumbling blocks to achieve quantum com-puting (QC). Here we propose an experimental method, using Josephson charge qubits, to efficiently solve these two central problems. The proposed QC architecture is scalable since any two charge qubits can be effectively coupled by an experimentally accessible inductance. More importantly, we formulate an efficient and realizable QC scheme that requires only one (instead of two or more) two-bit operation to implement conditional gates.

Citations

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Quantum Coherence with a Single Cooper Pair
• Josephson-junction qubits with controlled couplings
• Quantum-state engineering with Josephson-junction devices

Cited by

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• Optimal tuning of solid-state quantum gates: A universal two-qubit gate
• Correlation-induced suppression of decoherence in capacitively coupled Cooper-pair boxes
• Controllable manipulation and entanglement of macroscopic quantum states in coupled charge qubits
• Variable Electrostatic Transformer: Controllable Coupling of Two Charge Qubits
• Macroscopic Einstein-Podolsky-Rosen pairs in superconducting circuits
• Efficient one-step generation of large cluster states with solid-state circuits
• Interqubit coupling mediated by a high-excitation-energy quantum object
• Superconducting qubits coupled to nanoelectromechanical resonators: An architecture for solid-state quantum-information processing
• Generation of quantum logic operations from physical Hamiltonians
• Dispersive manipulation of paired superconducting qubits
• Generation of cluster states with Josephson charge qubits
• Tunable coupling of qubits: Nonadiabatic corrections
• Tuning quantum discord in Josephson charge qubits system
• Entanglement dynamics in chains of qubits with noise and disorder
• Switchable coupling between charge and flux qubits