408 citations · 2.9k across the 87 of their papers we have counts for
48 papers · 1 filter
Boundary logarithmic corrections to the dynamical correlation functions of one-dimensional spin-1/2 chains
Imke Schneider, Ipsita Mandal, Polina Matveeva +2
The asymptotic dynamical correlation functions in one-dimensional spin chains are described by power-laws. The corresponding exponents characterize different bulk and boundary crit…
Periodically Driven Many-Body Systems: A Floquet Density Matrix Renormalization Group Study
Shaon Sahoo, Imke Schneider, Sebastian Eggert
Driving a quantum system periodically in time can profoundly alter its long-time correlations and give rise to exotic quantum states of matter. The complexity of the combination of…
Dirac Spin Liquid on the Spin-1/2 Triangular Heisenberg Antiferromagnet
Shijie Hu, W. Zhu, Sebastian Eggert +1
We study the spin liquid candidate of the spin- - Heisenberg antiferromagnet on the triangular lattice by means of density matrix renormalization group (DMRG) simula…
Entanglement of Hard-Core Bosons in Bipartite Lattices
Xue-Feng Zhang, Raoul Dillenschneider, Sebastian Eggert
The entanglement of hard-core bosons in square and honeycomb lattices with nearest-neighbor interactions is estimated by means of quantum Monte Carlo simulations and spin-wave anal…
Floquet-Induced Superfluidity with Periodically Modulated Interactions of Two-Species Hardcore Bosons in a One-dimensional Optical Lattice
Tao Wang, Shijie Hu, Sebastian Eggert +3
We consider two species of hard-core bosons with density dependent hopping in a one-dimensional optical lattice, for which we propose experimental realizations using time-periodic…
Ground-state phase diagram of the frustrated spin-1/2 two-leg honeycomb ladder
Qiang Luo, Shijie Hu, Jize Zhao +3
We investigate a spin- two-leg honeycomb ladder with frustrating next-nearest-neighbor (NNN) coupling along the legs, which is equivalent to two - spin chains couple…
The dynamic structure factor in impurity-doped spin chains
Annabelle Bohrdt, Kevin Jägering, Sebastian Eggert +1
The effects of impurities in spin-1/2 Heisenberg chains are recently experiencing a renewed interest due to experimental realizations in solid state systems and ultra-cold gases. T…
Continuous easy-plane deconfined phase transition on the kagome lattice
Xue-Feng Zhang, Yin-Chen He, Sebastian Eggert +2
We use large scale quantum Monte-Carlo simulations to study an extended Hubbard model of hardcore bosons on the kagome lattice. In the limit of strong nearest-neighbor interactions…
Competing phases in spin ladders with ring exchange and frustration
Alexandros Metavitsiadis, Sebastian Eggert
The ground state properties of spin-1/2 ladders are studied, emphasizing the role of frustration and ring exchange coupling. We present a unified field theory for ladders with gene…
Magneto-caloric effects, quantum critical points, and the Berezinsky-Kosterlitz-Thouless transition in 2D coupled spin dimer systems
Dominik Strassel, Peter Kopietz, Sebastian Eggert
Spin dimer systems are a promising playground for the detailed study of quantum phase transitions. Using the magnetic field as the tuning parameter it is in principle possible to o…
The phase diagram of the antiferromagnetic XXZ model on the triangular lattice
Daniel Sellmann, Xue-Feng Zhang, Sebastian Eggert
We determine the quantum phase diagram of the antiferromagnetic spin-1/2 XXZ model on the triangular lattice as a function of magnetic field and anisotropic coupling . Using t…
Phase diagram of the triangular extended Hubbard model
Luca F. Tocchio, Claudius Gros, Xue-Feng Zhang +1
We study the extended Hubbard model on the triangular lattice as a function of filling and interaction strength. The complex interplay of kinetic frustration and strong interaction…
Spin liquid versus dimer phases in an anisotropic J1-J2 frustrated square antiferromagnet
Alexandros Metavitsiadis, Daniel Sellmann, Sebastian Eggert
The spin-1/2 J1-J2 antiferromagnet is a prototypical model for frustrated magnetism and one possible candidate for a realization of a spin liquid phase. The generalization of this…
Impurity entanglement through electron scattering in a magnetic field
Alexandros Metavitsiadis, Raoul Dillenschneider, Sebastian Eggert
We study the entanglement of magnetic impurities in an environment of electrons through successive scattering while an external magnetic field is applied. We show that the dynamics…
The even-odd effect in short antiferromagnetic Heisenberg chains
A. Machens, N. P. Konstantinidis, O. Waldmann +2
Motivated by recent experiments on chemically synthesized magnetic molecular chains we investigate the lowest lying energy band of short spin- antiferromagnetic Heisenberg chain…
Low-energy local density of states of the 1D Hubbard model
Stefan A. Soeffing, Imke Schneider, Sebastian Eggert
We examine the local density of states (DOS) at low energies numerically and analytically for the Hubbard model in one dimension. The eigenstates represent separate spin and charge…
Electron scattering from domain walls in ferromagnetic Luttinger liquids
N. Sedlmayr, S. Eggert, J. Sirker
We study the properties of interacting electrons in a one-dimensional conduction band coupled to bulk non-collinear ferromagnetic order. The specific form of non-collinearity we co…
Spin wave calculation of the field-dependent magnetization pattern around an impurity in Heisenberg antiferromagnets
Sergey Shinkevich, Olav F. Syljuåsen, Sebastian Eggert
We consider the magnetic-field dependent spatial magnetization pattern around a general impurity embedded in a Heisenberg antiferromagnet using both an analytical and a numerical s…
Non-Collinear Ferromagnetic Luttinger Liquids
Nicholas Sedlmayr, Sebastian Eggert, Jesko Sirker
The presence of electron-electron interactions in one dimension profoundly changes the properties of a system. The separation of charge and spin degrees of freedom is just one exam…
Dynamics and decoherence in the central spin model using exact methods
Michael Bortz, Sebastian Eggert, Christian Schneider +2
The dynamics and decoherence of an electronic spin-1/2 qubit coupled to a bath of nuclear spins via hyperfine interactions in a quantum dot is studied. We show how exact results fr…
Static impurities in a supersolid of interacting hard-core bosons on a triangular lattice
Xue-Feng Zhang, Yu-Chuan Wen, Sebastian Eggert
We study the effect of impurities in a supersolid phase in comparison to the behavior in the solid and superfluid phases. A supersolid phase has been established for interacting ha…
Recursive Method for the Density of States in One Dimension
Imke Schneider, Sebastian Eggert
We derive a powerful yet simple method for analyzing the local density of states in gapless one dimensional fermionic systems, including extensions such as momentum dependent inter…
Lattice vs. continuum theory of the periodic Heisenberg chain
Michael Bortz, Michael Karbach, Imke Schneider +1
We consider the detailed structure of low energy excitations in the periodic spin-1/2 XXZ Heisenberg chain. By performing a perturbative calculation of the non-linear corrections t…
Wigner crystal vs. Friedel oscillations in the 1D Hubbard model
Stefan A. Soeffing, Michael Bortz, Imke Schneider +3
We analyze the fermion density of the one-dimensional Hubbard model using bosonization and numerical DMRG calculations. For finite systems we find a relatively sharp crossover even…