Majorana Fermion Codes

Details Majorana Fermion Codes Majorana Fermion Codes

2010-04-21

arxiv.org/abs/1004.3791v2

New J.Phys. 12, 083039 (2010)

Physics

Quantum Physics

22 pages, 1 figure. References added + extended discussion

Scientific paper

We initiate the study of Majorana fermion codes. These codes can be viewed as extensions of Kitaev's 1D model of unpaired Majorana fermions in quantum wires to higher spatial dimensions and interacting fermions. The purpose of Majorana fermion codes (MFCs) is to protect quantum information against low-weight fermionic errors, that is, operators acting on sufficiently small subsets of fermionic modes. We examine to what extent MFCs can surpass qubit stabilizer codes in terms of their stability properties. A general construction of 2D MFCs is proposed which combines topological protection based on a macroscopic code distance with protection based on fermionic parity conservation. Finally, we use MFCs to show how to transform any qubit stabilizer code to a weakly self-dual CSS code.

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