OTOC-NMR Experiment: Error Mitigation, Modeling and Results

Reports the mitigation side of an experiment that computes out-of-time-order correlators for NMR of real molecules (toluene, DMBP) and compares them with spectrometer data. Echo rescaling and standard exponential ZNE left too much bias, and PEC was too costly in samples, so the team developed Pauli Path ZNE, which uses the structure of a Pauli-path unraveling of noisy evolution. On hardware it met the target accuracy and recovered molecular structure parameters close to independent NMR measurements.

• Accuracy target for <OTOC> and the base stack: calibration, dynamical decoupling, light-cone filtering, T-REX readout mitigation, twirling
• Why echo rescaling, exponential ZNE and PEC fell short here
• Pauli Path ZNE and a two-parameter model of circuit noise response
• Recovered H-H distances and dihedral angles compared with NMR benchmarks

Summary and key points drafted by a language model from the slides, not yet reviewed by me. The slides are the source.

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@misc{minev2026otocnmr,
  author = {Zlatko K. Minev},
  title = {{OTOC-NMR Experiment: Error Mitigation, Modeling and Results}},
  howpublished = {Talk, APS March Meeting},
  year = {2026},
  url = {https://zlatko-minev.github.io/zlatko-minev-quantum-repository/items/2026-otoc-nmr-experiment-error-mitigation-modeling-and/},
  note = {Slides}
}

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