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Scattering in Mass-Deformed N>=4 Chern-Simons Models
Abhishek Agarwal, Niklas Beisert, Tristan McLoughlin
We investigate the scattering matrix in mass-deformed N>=4 Chern-Simons models including as special cases the BLG and ABJM theories of multiple M2 branes. Curiously the structure o…
Boosting Nearest-Neighbour to Long-Range Integrable Spin Chains
Till Bargheer, Niklas Beisert, Florian Loebbert
We present an integrability-preserving recursion relation for the explicit construction of long-range spin chain Hamiltonians. These chains are generalizations of the Haldane-Shast…
Dual Superconformal Symmetry from AdS5 x S5 Superstring Integrability
Niklas Beisert, Riccardo Ricci, Arkady Tseytlin +1
We discuss 2d duality transformations in the classical AdS5 x S5 superstring and their effect on the integrable structure. T-duality along four directions in Poincare parametrizati…
The su(2|3) Undynamic Spin Chain
Niklas Beisert
The integrable spin chain found in perturbative planar N=4 supersymmetric gauge theory is dynamic. Here we propose a reformulation which removes the dynamic effects in order to mak…
Open Perturbatively Long-Range Integrable gl(N) Spin Chains
N. Beisert, F. Loebbert
We construct the most general perturbatively long-range integrable spin chain with spins transforming in the fundamental representation of gl(N) and open boundary conditions. In ad…
Quantum Stability for the Heisenberg Ferromagnet
Till Bargheer, Niklas Beisert, Nikolay Gromov
Highly spinning classical strings on RxS^3 are described by the Landau-Lifshitz model or equivalently by the Heisenberg ferromagnet in the thermodynamic limit. The spectrum of this…