Sebastian Greschner
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View article: Topological inheritance in two-component Hubbard models with single-component Su-Schrieffer-Heeger dimerization
Topological inheritance in two-component Hubbard models with single-component Su-Schrieffer-Heeger dimerization Open
The interplay between interparticle interactions and topological features may\nresult in unusual phenomena. Interestingly, interactions may induce topological\nfeatures in an originally trivial system, as we illustrate for the case of a\no…
View article: Quantum Monte Carlo study of superradiant supersolid of light in the extended Jaynes-Cummings-Hubbard model
Quantum Monte Carlo study of superradiant supersolid of light in the extended Jaynes-Cummings-Hubbard model Open
Herein, we study the extended Jaynes-Cummings-Hubbard model mainly by the\nlarge-scale worm quantum Monte-Carlo method to check whether or not a light\nsupersolid phase exists in various geometries, such as the one-dimensional\nchain, squa…
View article: Probing the Hall Voltage in Synthetic Quantum Systems
Probing the Hall Voltage in Synthetic Quantum Systems Open
In the context of experimental advances in the realization of artificial magnetic fields in quantum gases, we discuss feasible schemes to extend measurements of the Hall polarization to a study of the Hall voltage, allowing for direct comp…
View article: Topological charge pumping of bound bosonic pairs
Topological charge pumping of bound bosonic pairs Open
Experiments with bosonic atoms in optical superlattices allow for the\ninteresting possibility to study the adiabatic quantized pumping of bosonic\natoms in the presence of interactions. We investigate this exotic phenomenon\nfor bound bos…
View article: Deconfining Disordered Phase in Two-Dimensional Quantum Link Models
Deconfining Disordered Phase in Two-Dimensional Quantum Link Models Open
We explore the ground-state physics of two-dimensional spin-1/2 U(1) quantum link models, one of the simplest nontrivial lattice gauge theories with fermionic matter within experimental reach for quantum simulations. Whereas in the large m…
View article: Interacting bosons in generalized zigzag and railroad-trestle models
Interacting bosons in generalized zigzag and railroad-trestle models Open
We theoretically study the ground-state phase diagram of strongly interacting bosons on a generalized zig-zag ladder model, the rail-road trestle (RRT) model. By means of analytical arguments in the limits of decoupled chains and the case …
View article: Supersolid and pair correlations of the extended Jaynes-Cummings-Hubbard model on triangular lattices
Supersolid and pair correlations of the extended Jaynes-Cummings-Hubbard model on triangular lattices Open
We study the extended Jaynes-Cummings-Hubbard model on triangular cavity lattices and zigzag ladders. By using density-matrix renormalization group methods, we observe various types of solids with different density patterns and find eviden…
View article: Vanishing Hall Response of Charged Fermions in a Transverse Magnetic Field
Vanishing Hall Response of Charged Fermions in a Transverse Magnetic Field Open
We study the Hall response of two-dimensional lattice systems of charged fermions in a transverse magnetic field, in the ballistic coherent limit. We identify a setup in which this response vanishes over wide regions of parameter space: th…
View article: Three-body constrained bosons in a double-well optical lattice
Three-body constrained bosons in a double-well optical lattice Open
We analyse the ground-state properties of three-body constrained bosons in a one dimensional optical lattice with staggered hoppings analogous to the double well optical lattice. By considering attractive and repulsive on-site interactions…
View article: Universal Hall Response in Interacting Quantum Systems
Universal Hall Response in Interacting Quantum Systems Open
We theoretically study the Hall effect on interacting M-leg ladder systems, comparing different measures and properties of the zero temperature Hall response in the limit of weak magnetic fields. Focusing on SU(M) symmetric interacting bos…
View article: Three-body constrained bosons in Su-Schrieffer-Heeger(SSH) type model: Quantum phases, edge states and topological charge pumping
Three-body constrained bosons in Su-Schrieffer-Heeger(SSH) type model: Quantum phases, edge states and topological charge pumping Open
View article: Anomalous pairing of bosons: Effect of multibody interactions in an optical lattice
Anomalous pairing of bosons: Effect of multibody interactions in an optical lattice Open
An interesting first order type phase transition between Mott lobes has been\nreported in Phys. Rev. Lett. 109, 135302 (2012) for a two-dimensional\nBose-Hubbard model in the presence of attractive three-body interaction. We\nre-visit the …
View article: Probing the exchange statistics of one-dimensional anyon models
Probing the exchange statistics of one-dimensional anyon models Open
We propose feasible scenarios for revealing the modified exchange statistics\nin one-dimensional anyon models in optical lattices based on an extension of\nthe multicolor lattice-depth modulation scheme introduced in [{Phys. Rev. A 94,\n02…
View article: Hidden Order and Symmetry Protected Topological States in Quantum Link Ladders
Hidden Order and Symmetry Protected Topological States in Quantum Link Ladders Open
We show that, whereas spin-1/2 one-dimensional U(1) quantum-link models (QLMs) are topologically trivial, when implemented in ladderlike lattices these models may present an intriguing ground-state phase diagram, which includes a symmetry …
View article: Vortex-Hole Duality: A Unified Picture of Weak- and Strong-Coupling Regimes of Bosonic Ladders with Flux
Vortex-Hole Duality: A Unified Picture of Weak- and Strong-Coupling Regimes of Bosonic Ladders with Flux Open
Two-leg bosonic ladders with flux harbor a remarkable vortex-hole duality between the weak-coupling vortex lattice superfluids and strong-coupling charge-density-wave crystals. The strong-coupling crystalline states, which are realized in …
View article: Unconventional phases of attractive Fermi gases in synthetic Hall ribbons
Unconventional phases of attractive Fermi gases in synthetic Hall ribbons Open
A novel way to produce quantum Hall ribbons in a cold atomic system is to use\nM hyperfine states of atoms in a 1D optical lattice to mimic an additional\n"synthetic dimension". A notable aspect here is that the SU(M) symmetric\ninteractio…
View article: Ground-state properties of the one-dimensional unconstrained pseudo-anyon Hubbard model
Ground-state properties of the one-dimensional unconstrained pseudo-anyon Hubbard model Open
We study the (pseudo-) anyon Hubbard model on a one-dimensional lattice without the presence of a three-body hardcore constraint. In particular, for the pseudo-fermion limit of a large statistical angle θ ≈ π, we observe a wealth of exotic…
View article: Unconventional phases of attractive Fermi gases in synthetic Hall ribbons
Unconventional phases of attractive Fermi gases in synthetic Hall ribbons Open
An innovative way to produce quantum Hall ribbons in a cold atomic system is to use M hyperfine states of atoms in a one-dimensional optical lattice to mimic an additional "synthetic dimension." A notable aspect here is that the SU(M) symm…
View article: Symmetry-broken states in a system of interacting bosons on a two-leg ladder with a uniform Abelian gauge field
Symmetry-broken states in a system of interacting bosons on a two-leg ladder with a uniform Abelian gauge field Open
We study the quantum phases of bosons with repulsive contact interactions on a two-leg ladder in the presence of a uniform Abelian gauge field. The model realizes many interesting states, including Meissner phases, vortex fluids, vortex la…
View article: Supersolid and pair correlations of extended Jaynes-Cummings-Hubbard model on the triangular and one dimensional lattices
Supersolid and pair correlations of extended Jaynes-Cummings-Hubbard model on the triangular and one dimensional lattices Open
We study the extended Jaynes-Cummings-Hubbard model on the triangular and one-dimensional cavity lattices. By using mean-field and density matrix renormalization group methods, we observe various types of solids with different density patt…
View article: Engineering interactions and anyon statistics by multicolor lattice-depth modulations
Engineering interactions and anyon statistics by multicolor lattice-depth modulations Open
We show that a multicolor modulation of the depth of an optical lattice allows for a flexible independent control of correlated hopping, occupation-dependent gauge fields, effective on-site interactions without Feshbach resonances, and nea…
View article: Density-induced geometric frustration of ultra-cold bosons in optical lattices
Density-induced geometric frustration of ultra-cold bosons in optical lattices Open
A density-dependent gauge field may induce density-induced geometric frustration, leading to a non-trivial interplay between density modulation and frustration, which we illustrate for the particular case of ultra-cold bosons in zig-zag op…
View article: Frustration-induced supersolids in the absence of intersite interactions
Frustration-induced supersolids in the absence of intersite interactions Open
We discuss a mechanism for the realization of supersolids in lattices in the absence of intersite interactions that surprisingly works as well at unit filling. This mechanism, that we study for the case of the sawtooth lattice, is based on…
View article: Spontaneous Increase of Magnetic Flux and Chiral-Current Reversal in Bosonic Ladders: Swimming against the Tide
Spontaneous Increase of Magnetic Flux and Chiral-Current Reversal in Bosonic Ladders: Swimming against the Tide Open
The interplay between spontaneous symmetry breaking in many-body systems, the wavelike nature of quantum particles and lattice effects produces an extraordinary behavior of the chiral current of bosonic particles in the presence of a unifo…
View article: Density-dependent synthetic magnetism for ultracold atoms in optical lattices
Density-dependent synthetic magnetism for ultracold atoms in optical lattices Open
Raman-assisted hopping can allow for the creation of density-dependent synthetic magnetism for cold neutral gases in optical lattices. We show that the density-dependent fields lead to a nontrivial interplay between density modulations and…
View article: Anyon Hubbard Model in One-Dimensional Optical Lattices
Anyon Hubbard Model in One-Dimensional Optical Lattices Open
Raman-assisted hopping may be used to realize the anyon Hubbard model in one-dimensional optical lattices. We propose a feasible scenario that significantly improves the proposal of T. Keilmann et al. [Nat. Commun. 2, 361 (2011)], allowing…
View article: Polar molecules in frustrated triangular ladders
Polar molecules in frustrated triangular ladders Open
Polar molecules in geometrically frustrated lattices may result in a very rich landscape of quantum phases, due to the nontrivial interplay between frustration, and two- and possibly three-body intersite interactions. In this paper we illu…
View article: Vortex and Meissner phases of strongly interacting bosons on a two-leg ladder
Vortex and Meissner phases of strongly interacting bosons on a two-leg ladder Open
We establish the phase diagram of the strongly-interacting Bose-Hubbard model\ndefined on a two-leg ladder geometry in the presence of a homogeneous flux. Our\nwork is motivated by a recent experiment [Atala et al., Nature Phys. 10, 588\n(…