SKM 2021 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 9: Poster Session: Correlated Electrons
TT 9.43: Poster
Tuesday, September 28, 2021, 13:30–16:00, P
Localization dynamics in a centrally coupled system — •Sebastian Wenderoth1, Nathan Ng2, Michael Kolodrubetz3, Eran Rabani2, and Michael Thoss1 — 1University of Freiburg, Freiburg, Germany — 2University of California, Berkeley, USA — 3University of Texas, Dallas, USA
In recent years, locally interacting system with static disorder, such as e.g. a random-field Ising chain with nearest neighbor interactions, received much attention because they can exhibit many-body localization. Many-body localized systems fail to equilibrate locally under unitary time evolution due to the absence of transport and the emergence of quasi-local integrals of motions, and thus, retain information about the initial state in local observables.
In our work, we explore the dynamics of a spin chain with a local antiferromagnetic interaction,
and non-local spin-flip interactions induced by coupling of the spins to a central d-level system (qudit).
We employ the multilayer multiconfiguration time-dependent Hartree approach [2,3] to simulate the dynamics of
moderately large spin chains in a numerically exact way.
Using this approach, we examine dynamical properties of the spin chain and the qudit, with particular focus on the question
whether the system retains information about the initial state in local observables.
[1] A. Pal et al., Phys. Rev. B 82, 174411 (2010)
[2] H. Wang et al., J. Chem. Phys. 119, 1289 (2003)
[3] O. Vendrell et al., J. Chem. Phys. 134, 044135 (2011)