unitaryfund / mitiq

Mitiq is an open source toolkit for implementing error mitigation techniques on most current intermediate-scale quantum computers.
https://mitiq.readthedocs.io
GNU General Public License v3.0
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New Technique: Generalized Quantum Subspace Expansion #2377

Open purva-thakre opened 1 month ago

purva-thakre commented 1 month ago

Generalized QSE (GSE) introduced in https://arxiv.org/abs/2107.02611

Expands the 'search' subspace compared to what's used in QSE. Shown to be robust in the presence of imperfect control and is an error-agnostic QEM. Requires measurements that scale quadratically.

Dual GSE introduced in https://arxiv.org/abs/2309.14171

A better version of GSE that's resource-efficient in terms of required measurements. Relies on dual-state purification.