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Quantum Machine Learning Quantum Error Correction Fault Tolerance

Haar random codes attain the quantum Hamming bound, approximately

arXiv
Authors: Fermi Ma, Xinyu Tan, John Wright

Year

2025

Paper ID

51618

Status

Preprint

Abstract Read

~2 min

Abstract Words

115

Citations

N/A

Abstract

We study the error correcting properties of Haar random codes, in which a K-dimensional code space boldsymbol{C} subseteq mathbb{C}N is chosen at random from the Haar distribution. Our main result is that Haar random codes can approximately correct errors up to the quantum Hamming bound, meaning that a set of m Pauli errors can be approximately corrected so long as mK ll N. This is the strongest bound known for any family of quantum error correcting codes (QECs), and continues a line of work showing that approximate QECs can significantly outperform exact QECs [LNCY97, CGS05, BGG24]. Our proof relies on a recent matrix concentration result of Bandeira, Boedihardjo, and van Handel.

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  • This paper contributes to the Quantum Machine Learning research area in the Quantum Articles archive.
  • It adds a 2025 reference point for readers tracking recent quantum research.
  • We study the error correcting properties of Haar random codes, in which a K-dimensional code space boldsymbolC subseteq mathbbC^N is chosen at random from the Haar distribution.

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