Condensed Matter: Fluid dynamics of Incompressible Quantum Hall fluids| F. Duncan M. Haldane|Prof of Physics, Princeton University|JH Rm 5/9 @12PM

May 9, 2023, 12:00 pm1:00 pm
Physics faculty, post docs, grads



Event Description

While Laughlin identified the fractional quantum Hall state as a consequence of an “incompressible quantum fluid”, well-described by his model  wavefunction  which exhibits “flux attachment”, no fundamental explanation of the energetics driving “flux attachment” has emerged. A new picture reveals that  a fundamental property of quantum

Hall fluids is that their elementary unit, the “composite boson”, carries a (primitive, not “traceless”) electric quadrupole which couples to local electric field gradients, part of which (in the fractional case) is an emergent dynamical degree of freedom associated with “flux attachment”.  Many issues, such as “Hall viscosity”, edge dipole densities, etc. immediately become clear based on this new picture.