Two-Qubit Operations for Finite-Energy Gottesman-Kitaev-Preskill Encodings
We present techniques for performing two-qubit gates on Gottesman-Kitaev-Preskill (GKP) codes with finite energy, and find that operations designed for ideal infinite-energy codes create undesired entanglement when applied to physically realistic states. We demonstrate that this can be mitigated using recently developed local error-correction protocols, and evaluate the resulting performance. We also propose energy-conserving finite-energy gate implementations which largely avoid the need for further correction.
Authors
- Martin Wagener
- Jonathan Home (ORCID: https://orcid.org/0000-0002-4093-1550)
- Stephan Welte (ORCID: https://orcid.org/0009-0000-3743-7394)
- Florentin Reiter (ORCID: https://orcid.org/0000-0002-5217-3064)
- Ivan Rojkov (ORCID: https://orcid.org/0000-0001-7164-0265)
- Paul Moser Röggla
- Moritz Fontboté-Schmidt
Institutions
- ETH Zurich (CH)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-09-03
- DOI
- https://doi.org/10.1103/physrevlett.133.100601
- Citations
- 10
- Primary Topic
- Quantum Computing Algorithms and Architecture
- Type
- article
- Field-Weighted Citation Impact
- 3.47
Funders
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- National Center of Competence in Research Quantum Science and Technology