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Updated: Dec 27, 2025
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.2K
Multi-qubit phase gate on multiple resonators mediated by a superconducting bus.
Optics Express
|March 4, 2020
Summary
We present a novel one-step method for multi-qubit phase gates using microwave photons in circuit quantum electrodynamics. This approach enhances gate fidelity and robustness for quantum information processing.
Area of Science:
- Quantum Computing
- Circuit Quantum Electrodynamics (QED)
Background:
- Quantum information is encoded in microwave photons within resonators.
- A multi-level artificial atom functions as a quantum bus, mediating interactions.
Purpose of the Study:
- To propose a one-step scheme for implementing multi-qubit phase gates.
- To enhance gate fidelity and robustness in circuit QED systems.
Main Methods:
- Utilizing vacuum and single-photon Fock states in resonators.
- Employing pulse engineering to control coupling strengths.
- Investigating the impact of finite coherence times on gate fidelity.
- Implementing optimized detuning compensation to suppress unwanted transitions.
Main Results:
- Demonstrated a feasible one-step scheme for multi-qubit phase gates.
- Achieved improved fidelity and robustness through pulse engineering.
- Analyzed the effects of decoherence on gate performance.
- Showcased the suppression of unwanted transitions via detuning compensation.
Conclusions:
- The proposed scheme is feasible with current experimental technology.
- The method offers a promising route for scalable quantum computation.
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