1. Mohseni, M. et al. Nature 543, 171–174 (2017).
2. Smith, R. S., Curtis, M. J. & Zeng, W. J. Preprint at http://arxiv.org/abs/1608.03355 (2016).
3. Rubin, N. Preprint at http://arxiv.org/abs/1610.06910 (2016).
4. Farhi, E., Goldstone, J. & Gutmann, S. Preprint at http://arxiv.org/abs/1411.4028 (2014).
5. Kandala, A. et al. Preprint at http://arxiv.org/abs/1704.05018 (2017).