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cloud.google.com·6d ago
Cloud & Infrastructure
The New Stack·Jul 30·5 min read
IBM says quantum computers are getting harder to verify. That’s progress.
TL;DR
IBM reports that quantum computers are now capable of performing calculations that classical computers cannot verify, marking significant progress in the field. This advancement necessitates new verification methods to ensure the accuracy of quantum results.
✦ Why It Matters
Explore new verification methods for quantum computing results to enhance trust in your projects.
Key Takeaways
- Investigate IBM's new error-checking methods for quantum circuits.
- Consider the implications of quantum advantage in your projects.
- Stay updated on peer-reviewed results from IBM's recent studies.
- Explore cross-platform validation techniques for quantum results.
How It Works
The researchers encoded a 70-qubit circuit across 97 physical qubits, using 27 ancillas for error measurement. They implemented a Clifford circuit as a baseline and added complex T gates to increase difficulty for classical simulation.
The ancilla measurements allowed for postselection, discarding runs with errors and establishing a fidelity lower bound based on hardware checks.