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Phys. Rev. A 81, 032301 (2010) [15 pages]

Topological subsystem codes

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H. Bombin
Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 USA and Perimeter Institute for Theoretical Physics, 31 Caroline St. N., Waterloo, Ontario N2L 2Y5, Canada

Received 26 October 2009; published 3 March 2010

We introduce a family of two-dimensional (2D) topological subsystem quantum error-correcting codes. The gauge group is generated by two-local Pauli operators, so that two-local measurements are enough to recover the error syndrome. We study the computational power of code deformation in these codes and show that boundaries cannot be introduced in the usual way. In addition, we give a general mapping connecting suitable classical statistical mechanical models to optimal error correction in subsystem stabilizer codes that suffer from depolarizing noise.

© 2010 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.81.032301
DOI:
10.1103/PhysRevA.81.032301
PACS:
03.67.Pp