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SUMMARY:Generalized global symmetries and dissipative magnetohydrodynamics
  - Nabil Iqbal (Durham)
DTSTART:20170524T131500Z
DTEND:20170524T141500Z
UID:TALK71611@talks.cam.ac.uk
CONTACT:Shahar Hadar
DESCRIPTION:Just as ordinary global symmetries in quantum field theory are
  associated with conserved currents that count particle numbers\, “gener
 alized” global symmetries are associated with higher-form conserved curr
 ents that can be understood as counting higher-dimensional objects such as
  strings. I will discuss how this idea applies to the long-distance struct
 ure of theories of electromagnetism in four dimensions\, where a key role 
 is played by a higher-form conserved current that counts the density of ma
 gnetic flux lines. I will then use this higher form current to reformulate
  dissipative magnetohydrodynamics from the point of view of generalized sy
 mmetries and effective field theory. 
LOCATION:MR2\, Centre for Mathematical Sciences
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