Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series APC-TH
Subjects hep-th
Date Tuesday 2 May 2017
Time 14:00
Institute APC
Seminar Room 483 A - Malevitch
Speaker's Last Name Sigl
Speaker's First Name Günter
Speaker's Email Address
Speaker's Institution University of Hambourg
Title Chiral electrodynamics in astrophysics and cosmology
Abstract An asymmetry between left- and right-chiral lepton states can induce additional contributions to the electromagnetic current in the presence of magnetic fields or vortical fluid flows. In contrast to the usual Ohmic current these chiral currents are dissipationless. They can lead to instabilities such as the chiral magnetic effect in which magnetic fields can undergo an exponential growth phase, similar to the dynamo effect. We discuss astrophysical and cosmological contexts in which such effects may play a role, such as core collapse supernovae and magnetogenesis in the early Universe. Many open questions, however, remain some of which will also be discussed.
arXiv Preprint Number

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