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Spin and thermal conductivity of quantum spin ladders
C. Karrasch, D. M. Kennes, F. Heidrich-Meisner
We study the spin and thermal conductivity of spin-1/2 ladders at finite temperature. This is relevant for experiments with quantum magnets. Using a state-of-the-art density matrix…
Renormalization group flows in one-dimensional lattice models: impurity scaling, umklapp scattering and the orthogonality catastrophe
D. M. Kennes, M. J. Schmidt, D. Hübscher +1
We show that to understand the orthogonality catastrophe in the half-filled lattice model of spinless fermions with repulsive nearest neighbor interaction and a local impurity in i…
Universal quench dynamics of interacting quantum impurity systems
D. M. Kennes, V. Meden, R. Vasseur
The equilibrium physics of quantum impurities frequently involves a universal crossover from weak to strong reservoir-impurity coupling, characterized by single-parameter scaling a…
Spectral properties of one-dimensional Fermi systems after an interaction quench
D. M. Kennes, C. Klöckner, V. Meden
We show that the single-particle spectral properties of gapless one-dimensional Fermi systems in the Luttinger liquid state reached at intermediate times after an abrupt quench of…
Extending the range of real time density matrix renormalization group simulations
D. M. Kennes, C. Karrasch
We discuss a few simple modifications to time-dependent density matrix renormalization group (DMRG) algorithms which allow to access larger time scales. We specifically aim at begi…