Good experimentalists know how to calculate! In our quest to engineer and explore exotic materials, we often need to develop new techniques- on these occasions we grind out theory like the best of 'em (probably not the best of 'em-- we are experimentalists, first and foremost!); recent examples include a Floquet theory of (twisted, aspheric and non-paraxial) optical resonators and a new approach to stabilization of incompressible photonic quantum materials at non-zero chemical potential. See the publications below for details!
Alexandros Georgakopoulos, Ariel Sommer, Jonathan Simon, "Theory of Interacting Cavity Rydberg Polaritons" arXiv: 1805.07315 (2018)
Ruichao Ma, Clai Owens, Andrew Houck, David I Schuster, Jonathan Simon, "An Autonomous Stabilizer for Incompressible Photon Fluids and Solids" Physical Review A 95, 043811 (2017)
Ruichao Ma, Clai Owens, Aman LaChapelle, David I Schuster, Jonathan Simon, "Hamiltonian tomography of photonic lattices" Physical Review A 95, 062120 (2017)
Ariel Sommer, Jonathan Simon, "Engineering photonic Floquet Hamiltonians through Fabry-Perot resonators" New Journal of Physics 3, 035008 (2016)
Brandon M Anderson, Ruichao Ma, Clai Owens, David I Schuster, Jonathan Simon, "Engineering Topological Many-Body Materials in Microwave Cavity Arrays" Physical Review X 4, 041043 (2016)