Long-time dynamical decoupling and quantum control of qubits require high-precision control pulses. Full characterization (quantum tomography) of imperfect pulses presents a bootstrap problem: tomography requires initial states of a qubit which can not be prepared without imperfect pulses. We present a protocol for pulse error analysis, specifically tailored for a wide range of the single solid-state electron spins. Using a single electron spin of a nitrogen-vacancy (NV) center in diamond, we experimentally verify the correctness of the protocol, and demonstrate its usefulness for quantum control tasks.
@article{arxiv.1004.3315,
title = {Bootstrap tomography of high-precision pulses for quantum control},
author = {V. V. Dobrovitski and G. de Lange and D. Ristè and R. Hanson},
journal= {arXiv preprint arXiv:1004.3315},
year = {2015}
}