Local stabilizer codes in three dimensions without string logical operators

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 string-like 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 string-like logical operator of our code can be deformed to a disjoint union of short segments, and each segment is in the stabilizer group. The code has surface-like logical operators whose partial implementation has unsatisfied stabilizers along its boundary.

18 pages, 12 figures; clarified intermidiate steps in the proof

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Cited by in corpus (2)

• 3-d quantum stabilizer codes with a power law energy barrier
• Determining the structure of real-space entanglement spectrum from approximate conditional independence