Studies of ${cal N}=4$ super Yang Mills operators with large R-charge have shown that, in the planar limit, the problem of computing their dimensions can be viewed as a certain spin chain. These spin chains have fundamental ``magnon\'\' excitations which obey a dispersion relation that is periodic in the momentum of the magnons. This result for the dispersion relation was also shown to hold at arbitrary \'t Hooft coupling. Here we identify these magnons on the string theory side and we show how to reconcile a periodic dispersion relation with the continuum worldsheet description.

Collection/Series:

String Seminars

Scientific Areas:

Quantum Fields and Strings

Born-Infeld Black Holes

Submitted by Anonymous on November 3, 2012 - 9:37pm

Tuesday Jun 20, 2006

Collection/Series:

String Seminars

Scientific Areas:

Quantum Gravity,

Quantum Fields and Strings

Magnetic domain walls of relic fermions as Dark Energy

Submitted by Anonymous on November 3, 2012 - 9:37pm

Tuesday Jun 20, 2006

Speaker(s):

Urjit Yajnik

Collection/Series:

String Seminars

Scientific Areas:

Cosmology

Geometric Flows and String Theory

Submitted by Anonymous on November 3, 2012 - 9:37pm

Tuesday Jun 13, 2006

Speaker(s):

Suneeta Vardarajan

Geometric flows, especially the Ricci flow, have been used with considerable success in recent years to address the Poincare and Thurston conjectures for 3-manifolds. In this talk, I will briefly introduce these geometric flows, and describe how they appear in a completely different context in the physics of string theory. I will then outline how recently developed techniques in geometric flows could be used to address questions of importance in string theory.

Collection/Series:

String Seminars

Scientific Areas:

Quantum Fields and Strings