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Explore the fascinating physics of electron fluids in this comprehensive lecture from the Boulder Summer School 2025. Delve into the fundamental principles governing collective electron behavior in condensed matter systems, examining how electrons can exhibit fluid-like properties under specific conditions. Learn about the theoretical frameworks used to describe electron transport phenomena, including hydrodynamic approaches to electronic systems and the emergence of viscous flow in high-mobility materials. Discover the experimental signatures of electron fluid behavior, such as negative resistance and vortex formation, while understanding the role of electron-electron interactions in creating these exotic transport regimes. Investigate the conditions necessary for observing hydrodynamic electron flow, including the importance of sample geometry, temperature, and material properties. Examine cutting-edge research in graphene and other two-dimensional materials where electron fluid effects have been observed, and understand the implications for future electronic devices and quantum technologies.
