Physics – Quantum Physics
Scientific paper
2010-11-08
New J. Phys. 13, 053039 (2011)
Physics
Quantum Physics
10 pages of ideas plus 26 pages of calculations; 8 figures. v2, improved discussion of perturbation theory and relation to oth
Scientific paper
10.1088/1367-2630/13/5/053039
We present a procedure to obtain the Hamiltonians of the toric code and Kitaev quantum double models as the low-energy limits of entirely two-body Hamiltonians. Our construction makes use of a new type of perturbation gadget based on error-detecting subsystem codes. The procedure is motivated by a PEPS description of the target models, and reproduces the target models' behavior using only couplings which are natural in terms of the original Hamiltonians. This allows our construction to exactly capture the symmetries of the target models.
Bartlett Stephen D.
Brell Courtney G.
Doherty Andrew C.
Flammia Steven T.
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