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Statistical mechanical models for quantum codes with correlated noise

Wednesday October 24, 2018
4:00 pm


 Presenter:  Christopher Chubb, the University of Sydney
 Series:  CQuIC Seminars
 Abstract:  In this talk I will discuss generalising the mapping from quantum error correcting codes to stat. mech. models (originally due to Dennis, Kitaev, Landahl and Preskill) to the case of correlated Pauli noise. This mapping connects the error correcting threshold to a phase transition, allowing us to use methods for studying stat. mech. models to estimate code thresholds. Using this, I will present numerical
estimates of toric code thresholds under correlated noise. Time permitting, I will also discuss how this mapping can be used to give a tensor network-based algorithm for approximate optimal decoding of 2d
topological codes, generalising the decoder of Bravyi, Suchara and Vargo.

arXiv:1809.10704
 Host:  Rafael Alexander
 Location:  Room 190, Physics & Astronomy

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