Fault-Tolerant Continuous-Variable Measurement-based Quantum Computation Architecture

Mikkel V. Larsen

doi:10.1103/PRXQuantum.2.030325

2021-08-11

Mikkel V. Larsen *

Christopher Chamberland

Kyungjoo Noh

Jonas S. Neergaard-Nielsen

Ulrik L. Andersen

DOI：10.1103/PRXQuantum.2.030325

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摘要

En 中文

Continuous-variable measurement-based quantum computation on cluster states has in recent years shown great potential for scalable, universal, and fault-tolerant quantum computation when combined with the Gottesman-Kitaev-Preskill (GKP) code and quantum error correction. However, no complete fault-tolerant architecture exists that includes everything from cluster-state generation with finite squeezing to gate implementations with realistic noise and error correction. In this work, we propose a simple architecture for the preparation of a cluster state in three dimensions in which gates can be efficiently implemented by gate teleportation. To accommodate scalability, we propose architectures that allow both spatial and temporal multiplexing, with the temporally encoded version requiring as little as two squeezed light sources. Because of its three-dimensional structure, the architecture supports topological qubit error correction, while GKP error correction is efficiently realized within the architecture by teleportation. To validate fault tolerance, the architecture is simulated using surface-GKP codes, including noise from GKP states as well as gate noise caused by finite squeezing in the cluster state. We find a fault-tolerant squeezing threshold of 12.7 dB, with room for further improvement.

Keyword:

ERROR-CORRECTION

STATES

GENERATION

QUBIT

期刊

PRX Quantum

IF:

论文数:

919

被引数:

9.0K

机构

California Institute of Technology

学者数:

2.9W

论文数: 2.5W

被引数: 4.9W

technical university of denmark

学者数:

2.6W

论文数: 2.8W

被引数: 37

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