Spectral curve for open strings attached to the Y=0 brane

Understand

The concept of spectral curve is generalized to open strings in AdS/CFT with integrability preserving boundary conditions.

• Our definition is based on the logarithms of the eigenvalues of the open monodromy matrix and makes possible to determine all the analytic, symmetry and asymptotic properties of the quasimomenta.
• We work out the details of the whole construction for the Y = 0 brane boundary condition.
• The quasimomenta of open circular strings are explicitly calculated.