English

Generalised All-Optical Cat Correction

Quantum Physics 2026-03-24 v2 Optics

Abstract

We have generalised an all-optical telecorrection protocol for the higher orders of the cat code, and show that with these higher orders we can achieve target performance at substantially reduced iteration counts at the cost of a higher mean photon-number. We also introduce a probabilistic scheme for correcting deformation of the state, which highlights two interesting abilities of telecorrection: to encode new sets of transformations, and to change the basis of the code. We find that for a target channel fidelity of 99.9%99.9\% over a channel with 1 dB1\text{ dB} of loss, a third-order cat code requires 7070 times fewer telecorrection iterations than a first-order one, at a cost of a 3.63.6-fold increase in mean photon-number.

Keywords

Cite

@article{arxiv.2603.03263,
  title  = {Generalised All-Optical Cat Correction},
  author = {Ari John Boon and Olivier Landon-Cardinal and Nicolás Quesada},
  journal= {arXiv preprint arXiv:2603.03263},
  year   = {2026}
}

Comments

13 pages, 6 figures; for associated numerics, see https://github.com/polyquantique/CatTelecorrection

R2 v1 2026-07-01T11:01:40.924Z