Author

Júlia Barberà-Rodríguez

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Preprint Aug 2026

Direct fidelity estimation through joint fiducial grouping

Fault-tolerant quantum computation hinges on the requirement for low physical error rates. Reaching below threshold regime requires the accounting of circuit dependent noise, that is inherent to the execution context in which a quantum gate is usually embedded. Direct fidelity estimation is a technique that offers natu...

Júlia Barberà-Rodríguez, Arthur J. L. Strauss · 1 citation

Preprint Aug 2026

Strong unitary designs in optimal depth and space

For every fixed design order $k$ and measurable-error tolerance, strong approximate unitary designs in optimal $\Theta(\log n)$ all-to-all circuit depth are constructed using only the original system qubits using a logarithmic-depth Pauli-mixing bound for the perfect-matching ensemble.

Teodor Parella-Dilmé, Júlia Barberà-Rodríguez, Salvatore F. E. Oliviero et al. · 3 citations