31 citations · 88 across the 10 of their papers we have counts for
10 papers
Slow dynamics and non-ergodicity of the bosonic quantum East model in the semiclassical limit
Andreas Geißler, Juan P. Garrahan
We study the unitary dynamics of the bosonic quantum East model, a kinetically constrained lattice model which generalises the quantum East model to arbitrary occupation per site.…
Finite-size scaling analysis of localization transitions in the disordered two-dimensional Bose-Hubbard model within the fluctuation operator expansion method
Andreas Geißler
The disordered Bose-Hubbard model in two dimensions at non-integer filling admits a superfluid to Bose-glass transition at weak disorder. Less understood are the properties of this…
Mobility edge of the two dimensional Bose-Hubbard model
Andreas Geißler, Guido Pupillo
We analyze the disorder driven localization of the two dimensional Bose-Hubbard model by evaluating the full low energy quasiparticle spectrum via a recently developed fluctuation…
Supersolid phases of Rydberg-excited bosons on a triangular lattice
Jaromir Panas, Mathieu Barbier, Andreas Geißler +1
Recent experiments with ultracold Rydberg-excited atoms have shown that long-range interactions can give rise to spatially ordered structures. Observation of crystalline phases in…
Density-wave steady-state phase of dissipative ultracold fermions with nearest-neighbor interactions
Jaromir Panas, Michael Pasek, Arya Dhar +6
In this work we investigate the effect of local dissipation on the presence of density-wave ordering in spinful fermions with both local and nearest-neighbor interactions as descri…
Decay-dephasing-induced steady states in bosonic Rydberg-excited quantum gases in an optical lattice
Mathieu Barbier, Andreas Geißler, Walter Hofstetter
We investigate the possibility of realizing supersolid quantum phases in bosonic Rydberg-excited quantum lattice gases in the presence of non-unitary processes, by simulating the d…
Quasiparticle spectra of supersolid lattice gases at near-resonant Rydberg-dressing
Andreas Geißler, Ulf Bissbort, Walter Hofstetter
One of the major challenges in realizing a strongly interacting lattice gas using Rydberg states is the occurrence of avalanche loss processes. As these are directly proportional t…
Supersolidity of lattice Bosons immersed in strongly correlated Rydberg dressed atoms
Yongqiang Li, Andreas Geissler, Walter Hofstetter +1
Recent experiments have illustrated that long range two-body interactions can be induced by laser coupling atoms to highly excited Rydberg states. Stimulated by this achievement, w…
The infinite occupation number basis of bosons - solving a numerical challenge
Andreas Geißler, Walter Hofstetter
In any bosonic lattice system, which is not dominated by local interactions and thus "frozen" in a Mott-type state, numerical methods have to cope with the infinite size of the cor…
Condensation versus Long-range Interaction: Competing Quantum Phases in Bosonic Optical Lattice Systems at Near-resonant Rydberg Dressing
Andreas Geißler, Ivana Vasić, Walter Hofstetter
Recent experiments have shown that (quasi-)crystalline phases of Rydberg-dressed quantum many-body systems in optical lattices (OL) are within reach. Rydberg systems naturally poss…