J. Chen, Ji, Z., Kribs, D., Wei, Z., and Zeng, B.,
“Ground-State Spaces of Frustration-Free Hamiltonians”,
Journal of Mathematical Physics, vol. 53, no. 10, p. 102201, 2012.
X. Ma, Jackson, T., Zhou, H., Chen, J., Lu, D., Mazurek, M. D., Fisher, K. A. G., Peng, X., Kribs, D., Resch, K. J., Ji, Z., Zeng, B., and Laflamme, R.,
“Pure-state tomography with the expectation value of Pauli operators”,
Physical Review A, vol. 93, no. 3, p. 032140, 2016.