All-Gaussian Universality and Fault Tolerance with the Gottesman-Kitaev-Preskill Code. Baragiola, B. Q., Pantaleoni, G., Alexander, R. N., Karanjai, A., & Menicucci, N. C. Phys. Rev. Lett., 123:200502, American Physical Society, Nov, 2019. Link doi abstract bibtex The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator is particularly appealing for fault-tolerant quantum computing with bosons because Gaussian operations on encoded Pauli eigenstates enable Clifford quantum computing with error correction. We show that applying GKP error correction to Gaussian input states, such as vacuum, produces distillable magic states, achieving universality without additional non-Gaussian elements. Fault tolerance is possible with sufficient squeezing and low enough external noise. Thus, Gaussian operations are sufficient for fault-tolerant, universal quantum computing given a supply of GKP-encoded Pauli eigenstates.
@article{PhysRevLett.123.200502,
abstract = {The Gottesman-Kitaev-Preskill (GKP) encoding of a qubit within an oscillator is particularly appealing for fault-tolerant quantum computing with bosons because Gaussian operations on encoded Pauli eigenstates enable Clifford quantum computing with error correction. We show that applying GKP error correction to Gaussian input states, such as vacuum, produces distillable magic states, achieving universality without additional non-Gaussian elements. Fault tolerance is possible with sufficient squeezing and low enough external noise. Thus, Gaussian operations are sufficient for fault-tolerant, universal quantum computing given a supply of GKP-encoded Pauli eigenstates.},
author = {Baragiola, Ben Q. and Pantaleoni, Giacomo and Alexander, Rafael N. and Karanjai, Angela and Menicucci, Nicolas C.},
date-added = {2020-06-26 14:16:59 +1000},
date-modified = {2020-06-26 14:17:28 +1000},
doi = {10.1103/PhysRevLett.123.200502},
issue = {20},
journal = {Phys. Rev. Lett.},
month = {Nov},
numpages = {6},
pages = {200502},
publisher = {American Physical Society},
title = {All-Gaussian Universality and Fault Tolerance with the Gottesman-Kitaev-Preskill Code},
url_link = {https://link.aps.org/doi/10.1103/PhysRevLett.123.200502},
volume = {123},
year = {2019},
Bdsk-Url-1 = {https://link.aps.org/doi/10.1103/PhysRevLett.123.200502},
Bdsk-Url-2 = {https://doi.org/10.1103/PhysRevLett.123.200502}}
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