Certifying the Building Blocks of Quantum Computers from Bell's Theorem

Area of Science:

• Quantum Information Science
• Quantum Computing
• Foundations of Quantum Mechanics

Background:

• Bell's theorem provides device-independent certification for quantum state preparation and measurement.
• Existing certification methods do not cover all essential quantum computing building blocks.
• Quantum device imperfections pose challenges for reliable quantum computation.

Purpose of the Study:

• To develop a method for certifying coherent quantum operations using Bell's theorem.
• To complete the toolkit for certifying all fundamental components of a quantum computer.
• To establish a robust certification process applicable to current quantum devices.

Main Methods:

• Extension of Bell's theorem to certify quantum operations.
• Development of protocols for device-independent certification of quantum storage, processing, and transfer.
• Analysis of robustness against experimental imperfections.

Main Results:

• A novel method based on Bell's theorem for certifying coherent quantum operations is presented.
• This method covers the certification of quantum information storage, processing, and transfer.
• The approach demonstrates robustness against common experimental imperfections.

Conclusions:

• The proposed method completes the set of tools required for certifying all building blocks of a quantum computer.
• The robustness of the method allows for the qualification of current quantum devices for future quantum computers.
• This work advances the reliable development and deployment of quantum computing technologies.