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Dynamical Properties of one dimensional Mott Insulators
Davide Controzzi, Fabian H. L. Essler, Alexei M. Tsvelik
At low energies the charge sector of one dimensional Mott insulators can be described in terms of a quantum Sine-Gordon model. Using exact results derived from integrability it is…
Optical conductivity of one-dimensional Mott insulators
Davide Controzzi, Fabian H. L. Essler, Alexei M. Tsvelik
We calculate the optical conductivity of one-dimensional Mott insulators at low energies using a field theory description. The square root singularity at the optical gap, character…
A numerical method for detecting incommensurate correlations in the Heisenberg zigzag ladder
A. A. Aligia, C. D. Batista, F. H. L. Essler
We study two Heisenberg spin-1/2 chains coupled by a frustrating ``zigzag'' interaction. We are particularly interested in the regime of weak interchain coupling, which is difficul…