activity
20082021
most citedA non-Hermitian symmetric Bose-Hubbard model: eigenvalue rings from unfolding higher-order exceptional points

228 citations · 937 across the 7 of their papers we have counts for

collaborators

7 papers

quant-ph2021★ 23 cited

Representation of binary classification trees with binary features by quantum circuits

Raoul Heese, Patricia Bickert, Astrid Elisa Niederle

We propose a quantum representation of binary classification trees with binary features based on a probabilistic approach. By using the quantum computer as a processor for probabil…

cond-mat.quant-gas2016★ 60 cited

Ultracold Bosons with cavity-mediated long-range interactions: A local mean field analysis of the phase diagram

Astrid E. Niederle, Giovanna Morigi, Heiko Rieger

Ultracold bosonic atoms in optical lattices self-organize into a variety of structural and quantum phases when placed into a single-mode cavity and pumped by a laser. Cavity optome…

astro-ph.GA2015

X-ray haloes and star formation in early-type galaxies

Andrea Negri, Silvia Pellegrini, Luca Ciotti

High resolution 2D hydrodynamical simulations describing the evolution of the hot ISM in axisymmetric two-component models of early-type galaxies well reproduced the observed trend…

cond-mat.dis-nn2013★ 48 cited

Superfluid clusters, percolation and phase transitions in the disordered, two dimensional Bose-Hubbard model

Astrid Niederle, Heiko Rieger

The Bose glass (BG) phase is the Griffiths region of the disordered Bose Hubbard model (BHM), characterized by finite, quasi-superfluid clusters within a Mott insulating background…

quant-ph2010★ 144 cited

Quantum Classical Correspondence for a non-Hermitian Bose-Hubbard Dimer

Eva-Maria Graefe, Hans Jürgen Korsch, Astrid Elisa Niederle

We investigate the many-particle and mean-field correspondence for a non-Hermitian N-particle Bose-Hubbard dimer where a complex onsite energy describes an effective decay from one…

quant-ph2008★ 217 cited

Mean-field dynamics of a non-Hermitian Bose-Hubbard dimer

E. M. Graefe, H. J. Korsch, A. E. Niederle

We investigate an -particle Bose-Hubbard dimer with an additional effective decay term in one of the sites. A mean-field approximation for this non-Hermitian many-particle syste…