James P. Eisenstein
Professor of Physics
California Institute of Technology
 

Two-dimensional electron gases remain seductive to
physicists interested in the subtleties of many-body systems.
Even as the famous fractional quantum Hall effect and its
bizarre quarkish quasiparticles become commonplace, new
and very different discoveries continue to be made.  In this
talk I will discuss two examples of such discoveries: The detection
of an entirely new class of collective states in which electrons
appear to bunch up into long ribbons or bubbles, and the observation
of Josephson-like tunneling in an electron system which, though not
superconducting, is believed to exhibit superfluidity.