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Effective quantum memory Hamiltonian from local two-body interactions
Adrian Hutter, Fabio L. Pedrocchi, James R. Wootton +1
In [Phys. Rev. A 88, 062313 (2013)] we proposed and studied a model for a self-correcting quantum memory in which the energetic cost for introducing a defect in the memory grows wi…
Self-correcting quantum memory with a boundary
Adrian Hutter, James R. Wootton, Beat Röthlisberger +1
We study the two-dimensional toric code Hamiltonian with effective long-range interactions between its anyonic excitations induced by coupling the toric code to external fields. It…
High threshold error correction for the surface code
James R. Wootton, Daniel Loss
An algorithm is presented for error correction in the surface code quantum memory. This is shown to correct depolarizing noise up to a threshold error rate of 18.5%, exceeding prev…