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Universal set of scalable dynamically corrected gates for quantum error correction with always-on qubit couplings (1209.2764v1)
Published 13 Sep 2012 in quant-ph, cond-mat.mes-hall, and cond-mat.supr-con
Abstract: We construct a universal set of high fidelity quantum gates to be used on a sparse bipartite lattice with always-on Ising couplings. The gates are based on dynamical decoupling sequences using shaped pulses, they protect against low-frequency phase noise, and can be run in parallel on non-neighboring qubits. This makes them suitable for implementing quantum error correction with low-density parity check codes like the surface codes and their finite-rate generalizations. We illustrate the construction by simulating quantum Zeno effect with the $[[4,2,2]]$ toric code on a spin chain.
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