Seminar series
Date
Mon, 21 Oct 2013
Time
12:00 -
13:00
Location
L5
Speaker
Ryo Suzuki
Organisation
Oxford
The energy of an open string ending on giant-graviton branes in the AdS_5xS^5 spacetime is equal to the dimension of determinant-like operators in N=4 super Yang-Mills, according to AdS/CFT. We investigate this correspondence under a brane-antibrane setup by using gauge theory and integrability methods, and propose Boundary TBA equations to compute the exact dimensions of the determinant-like operators at any coupling. By solving the Boundary TBA numerically, we found a divergence of the exact energies at a finite value of the 't Hooft coupling constant, implying that string states are tachyonic at strong coupling. In this talk I would like to explain the origin of singularity after briefly reviewing the application of integrability methods to AdS/CFT.