Understanding and Applications of Quantum Hall Effects

This lecture by Prof. Tomasz Dietl from the International Research Centre MagTop and Institute of Physics at the Polish Academy of Sciences explores the quantum Hall effects, their understanding, and applications. Discover the crucial role of charges and magnetic impurities in topological physics related to quantum Hall effects. Learn how quantum macroscopic phenomena in solids contribute to high-precision metrology. The presentation also addresses an intriguing question: could the redundancy of quantum effects and host materials reveal new physics that has traditionally been sought through expensive high-energy colliders? This 56-minute Warsaw colloquium for theoretical physics was presented at the Center for Theoretical Physics of the Polish Academy of Sciences on March 26, 2025.