Localization dynamics in a centrally coupled system
ORAL
Abstract
We investigate a disordered Ising chain in which all spins couple to a central qudit, through which spin flip interactions are mediated. For small but finite coupling, the trivial localization of the non-coupled limit survives as a form of many-body localization (MBL). By using an exact wavefunction propagation method, we are able to observe the dynamics of large system sizes (L~50-100) to intermediate timescales and establish the existence of slow or vanishing relaxation. This allows us to address the question of the proper scaling of the qudit size with L in the thermodynamic limit, the suppression of effective all-to-all coupling to protect MBL, and the dependence of localization on energy density.
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Presenters
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Nathan Ng
University of California, Berkeley
Authors
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Nathan Ng
University of California, Berkeley
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Rajagopala Seelam
University of Freiburg
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Sebastian Wenderoth
University of Freiburg
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Michael Kolodrubetz
University of Texas at Dallas
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Eran Rabani
University of California, Berkeley, Chemistry, University of California, Berkeley, Department of Chemistry, University of California, Berkeley
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Michael Thoss
University of Freiburg