Coexistence of Anomalous and Normal Diffusion in Integrable Mott Insulators

Details Coexistence of Anomalous and Normal Diffusion in Integrable Mott Insulators Coexistence of Anomalous and Normal Diffusion in Integrable Mott Insulators

2012-01-13

arxiv.org/abs/1201.2844v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

We study the finite-momentum spin dynamics in the one-dimensional XXZ spin chain within the Ising-type regime at high temperatures using density autocorrelations within linear response theory and real-time propagation of nonequilibrium densities. While for the nonintegrable model results are well consistent with normal diffusion, the finite-size integrable model unveils the coexistence of anomalous and normal diffusion in different regimes of time. In particular, numerical results show a Gaussian relaxation at smallest nonzero momenta which we relate to nonzero stiffness in a grand canonical ensemble. For larger but still small momenta normal-like diffusion is recovered. Similar results for the model of impenetrable particles also help to resolve rather conflicting conclusions on transport in integrable Mott insulators.

Affiliated with

Also associated with

No associations

Rating

Coexistence of Anomalous and Normal Diffusion in Integrable Mott Insulators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coexistence of Anomalous and Normal Diffusion in Integrable Mott Insulators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coexistence of Anomalous and Normal Diffusion in Integrable Mott Insulators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-471730