Benchmarking an 11-qubit quantum computer

Area of Science:

• Quantum Computing
• Quantum Information Science
• Atomic Physics

Background:

• Quantum computing has advanced from theoretical concepts to functional devices over two decades.
• Universal quantum computers promise significant efficiency gains for complex scientific and commercial problems.

Purpose of the Study:

• To present a fully-connected, programmable 11-qubit quantum computer utilizing trapped ¹⁷¹Yb⁺ ions.
• To benchmark the system's performance against existing quantum hardware.

Main Methods:

• Construction of an 11-qubit trapped ion quantum computer with full connectivity.
• Demonstration of high-fidelity single-qubit (99.5%) and two-qubit (97.5%) gate operations.
• Measurement of State Preparation and Measurement (SPAM) errors at 0.7%.

Main Results:

• Achieved average single-qubit gate fidelities of 99.5% and two-qubit gate fidelities of 97.5%.
• Demonstrated low SPAM errors of 0.7%.
• Successfully executed Bernstein-Vazirani (78% success) and Hidden Shift (35% success) algorithms, outperforming other hardware.

Conclusions:

• The developed trapped ion quantum computer represents a high-performance universal quantum computing platform.
• The system's performance on benchmark algorithms indicates its superiority over current quantum hardware.
• This work provides a strong foundation for future advancements in quantum computation and simulation.