High Energy Physics Seminar: Dr. Yi Yin, MIT.  Add To Calendar

  • Date(s): Wednesday, 12/14 1:30 PM to Wednesday, 12/14 2:30 PM
  • Speaker: Dr. Yi Yin
  • Host: Misha Stephanov
  • Campus Address: 2214 SES (Science and Engineering South)

Title: New quantum effects in magnetohydrodynamics: chirality, topology and inverse cascade

Abstract: 
Chiral anomaly induces a family of macroscopic quantum behaviors in chiral medium, including the chiral magnetic effect. The application of these effects covers systems of enormous varieties and scales, ranging from the structure of primordial magnetic field in the early universe to charged particle correlation in heavy-ion collisions and negative magnetoresistivity in the newly discovered Weyl semimetal. In this talk, I will present three closely related aspects of new quantum effects present in fluids that contain chiral fermions: topology, instability and self-similarity. I will demonstrate the magnetic reconnections changing chirality of magnetic flux induces in the fluid a quantized electric current, a new kind of the "chiral magnetic effect". I further show self-similar inverse cascade driven by the chiral magnetic current. Finally, I report a new type of instability in a magnetohydrodynamics due to anomaly.

HEP Dec14 flyer