Novel protocol reconstructs quantum states in large-scale experiments up to 96 qubits
Why it matters: This protocol could enable more reliable analysis and development of quantum computers with hundreds of qubits.
- A new protocol has been developed by researchers at Université Grenoble Alpes, Technical University of Munich, Max Planck Institute of Quantum Optics, University of Innsbruck, and University of Bologna to reconstruct quantum states in large-scale experiments.
- The protocol has been successfully used to reconstruct states in quantum systems up to 96 qubits, a significant improvement over previous methods limited to 10-15 qubits.
- Matteo Votto, the paper's first author, explained that the team realized noisy quantum systems, which are easier to simulate, also contain "less information" and should be easier to analyze, leading to the development of this efficient protocol.
- The team's protocol prepares large-scale quantum states on IBM's superconducting quantum processor Brisbane and then performs randomized measurements on individual qubits to extract useful information.
Researchers have developed a novel protocol that can reliably reconstruct quantum states in large-scale experiments, successfully testing it on systems with up to 96 qubits. This breakthrough addresses the significant challenge of describing and measuring states in increasingly complex quantum computers, which was previously limited to 10-15 qubits due to expensive measurement requirements. The protocol leverages the unique properties of tensor network states, particularly matrix-product operators (MPOs), to efficiently analyze global properties of very large experimental quantum devices.
