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Published April 22, 2011 | Published + Submitted
Journal Article Open

Local stabilizer codes in three dimensions without string logical operators

Haah, Jeongwan

Abstract

We suggest concrete models for self-correcting quantum memory by reporting examples of local stabilizer codes in 3D that have no string logical operators. Previously known local stabilizer codes in 3D all have stringlike logical operators, which make the codes non-self-correcting. We introduce a notion of "logical string segments" to avoid difficulties in defining one-dimensional objects in discrete lattices. We prove that every stringlike logical operator of our code can be deformed to a disjoint union of short segments, each of which is in the stabilizer group. The code has surfacelike logical operators whose partial implementation has unsatisfied stabilizers along its boundary.

Additional Information

© 2011 American Physical Society. Received 27 January 2011; published 22 April 2011. This research was supported in part by the NSF under Grant No. PHY-0803371, by ARO Grant No. W911NF-09-1-0442, by DOE Grant No. DE-FG03-92-ER40701, and by the Korea Foundation for Advanced Studies. I thank Salman Beigi, Liang Jiang, and especially John Preskill for useful discussions.

Attached Files

Published - Haah2011p13808Phys_Rev_A.pdf

Submitted - 1101.1962v2.pdf

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