Producing cluster states in charge qubits and flux qubits

Area of Science:

• Quantum Information Science
• Solid-State Physics
• Quantum Computing

Background:

• Generating entangled states is crucial for quantum computation.
• Solid-state qubits, such as charge, superconducting, and flux qubits, are promising platforms for scalable quantum computers.
• Nonuniformity in solid-state qubits presents a challenge for maintaining quantum coherence and entanglement.

Purpose of the Study:

• To propose an efficient method for generating cluster states in multiple types of solid-state qubits.
• To investigate the robustness of these cluster states against inherent nonuniformities in solid-state systems.
• To assess the potential of cluster states for enabling quantum computation in solid-state architectures.

Main Methods:

• Development of a "one-touch" entanglement operation using gate bias voltage tuning for charge qubits.
• Theoretical analysis and simulation of cluster state generation in semiconducting, superconducting, and flux qubits.
• Investigation of cluster state fidelity and stability under conditions mimicking solid-state nonuniformities.

Main Results:

• Demonstration of efficient cluster state generation across different solid-state qubit modalities.
• Realization of highly entangled cluster states via a simplified "one-touch" operation.
• Quantification of the robustness of cluster states against qubit nonuniformities, showing resilience.

Conclusions:

• The proposed method offers an efficient pathway to generate essential cluster states for quantum computation.
• Cluster states exhibit promising robustness, making them suitable for practical solid-state quantum computing.
• This work supports the viability of cluster-state quantum computation using solid-state qubits.