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Classical many-body chaos with and without quasiparticles
(2020-11-09)
We study correlations, transport and chaos in a Heisenberg magnet as a classical model many-body system. By varying temperature and dimensionality, we can tune between settings with and without symmetry breaking and ...
Anomalous dynamics and equilibration in the classical Heisenberg chain
(2021-08-26)
The search for departures from standard hydrodynamics in many-body systems has yielded a number of promising leads, especially in low dimension. Here we study one of the simplest classical interacting lattice models, the ...
Disordered flat bands on the kagome lattice
(2018-09-27)
We study two models of correlated bond- and site-disorder on the kagome lattice considering both translationally invariant and completely disordered systems. The models are shown to exhibit a perfectly at ground state band ...
Exotic superconductivity through bosons in a dynamical cluster approximation
(2015-08-07)
We study the instabilities towards (exotic) superconductivity of mixtures of spin-1/2 fermions coupled to scalar bosons on a two-dimensional square lattice with the Dynamical-Cluster-Approximation (DCA) using a numerically ...
Dynamical generation of spin squeezing in ultra-cold dipolar molecules
(2020-11-16)
We study a bulk fermionic dipolar molecular gas in the quantum degenerate regime confined in a two-dimensional geometry. Using two rotational states of the molecules we encode a spin 1/2 degree of freedom. To describe the ...
Jammed spin liquid in the bond-disordered kagome Heisenberg antiferromagnet
(2017-06-13)
We study a class of continuous spin models with bond disorder including the kagome Heisenberg antiferromagnet. For weak disorder strength, we find discrete ground states whose number grows exponentially with system size. ...
Population dynamics in Floquet realisation of Harper-Hofstadter Hamiltonian
(2015-04-21)
We study the recent Floquet-realisation of the Harper-Hofstadter model in a gas of cold bosonic atoms. We study in detail the scattering processes in this system in the weakly interacting regime due to the interplay of ...