f Energy at ASU, and also by Australian National University. FW supported by the U.S. Department of Energy under contract No. DE-FG02-05ER41360. 1 J. Aasi et al. (LIGO Collaboration), Nature Photon. 7, 613 (2013). 2 T. Rotlunan and S. Boughn, Foundations of Physics 36, 1801 (2006), arXiv:gr-qc/0601043. (3 L