A simple all-microwave entangling gate for fixed-frequency superconducting qubits

2011/06/03 by Jerry M. Chow, Antonio Córcoles, A. D. Corcoles +16 · 6 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevlett.107.080502

published as Phys. Rev. Lett. 107, 080502 (2011)

arxiv created 2011/06/03 · openalex publication_date 2011/08/17 · arxiv updated 2011/09/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate an all-microwave two-qubit gate on superconducting qubits which are fixed in frequency at optimal bias points. The gate requires no additional subcircuitry and is tunable via the amplitude of microwave irradiation on one qubit at the transition frequency of the other. We use the gate to generate entangled states with a maximal extracted concurrence of 0.88 and quantum process tomography reveals a gate fidelity of 81%.

Citations

• Implementing optimal control pulse shaping for improved single-qubit gates
• Demonstration of conditional gate operation using superconducting charge qubits
• A simple formula for the average gate fidelity of a quantum dynamical operation
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Coupling superconducting qubits via a cavity bus
• Entanglement Metrology Using a Joint Readout of Superconducting Qubits

Cited by

• Implementing a strand of a scalable fault-tolerant quantum computing fabric
• Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits
• Characterizing a Four-Qubit Planar Lattice for Arbitrary Error Detection
• Circuit QED lattices: Towards quantum simulation with superconducting circuits
• Microwave-activated high-fidelity three-qubit gate scheme for fixed-frequency superconducting qubits
• Jerry M. Chow [wikipedia]