Gautam Naik: Quantum Spin Ice: From θ- electromagnetism to stray-field magnetometry

A central challenge in condensed matter physics has been the study and observation of interesting verifiable quantum phenomena within materials. Quantum spin liquids have been at the forefront of this endeavor. The central focus of this dissertation is three-dimensional quantum spin ice systems, which host an exotic phase characterized by emergent electromagnetism. Despite significant progress in understanding and probing the physics within these systems over the last two decades, definitive evidence for the quantum spin liquid phase remains elusive. In this dissertation, we study quantum spin ice on two fronts. On the theoretical front, we investigate interactions within materials necessary to realize a parity and time-reversal broken phase of