Novel protocol reconstructs quantum states in large-scale experiments up to 96 qubits

Researchers unveiled a breakthrough protocol in March 2026 that reconstructs quantum states in large-scale experiments, scaling up to 96 qubits—the largest demonstration to date. The method addresses a critical bottleneck: measuring and verifying quantum states grows exponentially harder as qubit counts rise, threatening scalability in near-term devices. Unlike traditional tomography, the protocol uses efficient sampling techniques to reduce measurement overhead, enabling practical characterization of high-dimensional quantum systems. Experiments validated the approach on superconducting and trapped-ion platforms, proving its versatility across leading quantum hardware architectures. This advancement accelerates error mitigation and benchmarking, bringing fault-tolerant quantum computing closer by improving state reconstruction reliability at unprecedented scales.