The Fine Structure of Quantum Spin Ice

Explore the fascinating world of quantum spin ice in this physics colloquium talk. Delve into the emergent quantum electrodynamics (QED) found in magnetic materials, which exhibit properties both familiar and unfamiliar compared to standard electromagnetic theory. Learn about the emergence of charges, anti-charges, photons, and magnetic monopoles in these condensed-matter systems. Discover how the fine structure constant in quantum spin ice differs significantly from that of our universe, and understand its implications for spinon dynamics. Examine the potential for observing emergent magnetic monopoles and an 'inverted' Lorentz force through the coupling of electric fields with these magnetic insulators. Gain insights into this alternative "vacuum" that provides a unique laboratory for exploring effective QED in regimes inaccessible to traditional Maxwell electromagnetism.