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Fidelity Determines the Minimum Error of Quantum Recovery
Dario Picozzi
Even a recovery that maximizes worst-input entanglement fidelity can retain avoidable errors in subsequent measurements. Entanglement fidelity is the probability of passing a test…
A hardware-efficient variational ansatz with an exact diagonal metric for real- and imaginary-time evolution and Haar sampling
Dario Picozzi
Variational quantum algorithms depend on the geometry of their parametrised circuits: metric-aware optimisation and time evolution require the Fubini--Study metric, which has hithe…
Symmetry-adapted qubit encoding with complete active space and Bravyi--Kitaev mapping for quantum chemistry on a quantum computer
Dario Picozzi, Jonathan Tennyson
We present a symmetry-adapted qubit encoding with complete active space (SAE-CAS) for quantum chemistry on fault-tolerant and near-term quantum processors. Building on exact-symmet…
Periodic Symmetry-Adapted Encoding: Qubit Reduction in Crystalline Electronic Structure
Dario Picozzi
We introduce periodic symmetry-adapted encoding (SAE) for qubit-efficient simulations of crystalline materials, extending the molecular SAE framework developed in earlier work to p…