123 citations · 409 across the 10 of their papers we have counts for
10 papers
Tensor network methods with graph enhancement
R. Hübener, C. Kruszynska, L. Hartmann +3
We present applications of the renormalization algorithm with graph enhancement (RAGE). This analysis extends the algorithms and applications given for approaches based on matrix p…
Renormalization algorithm with graph enhancement
R. Hübener, C. Kruszynska, L. Hartmann +4
We introduce a class of variational states to describe quantum many-body systems. This class generalizes matrix product states which underly the density-matrix renormalization grou…
Entanglement and its dynamics in open, dissipative systems
L. Hartmann, W. Dür, H. -J. Briegel
Quantum mechanical entanglement can exist in noisy open quantum systems at high temperature. A simple mechanism, where system particles are randomly reset to some standard initial…
On the role of memory errors in quantum repeaters
L. Hartmann, B. Kraus, H. -J. Briegel +1
We investigate the influence of memory errors in the quantum repeater scheme for long-range quantum communication. We show that the communication distance is limited in standard op…
Steady state entanglement in open and noisy quantum systems at high temperature
L. Hartmann, W. Dür, H. -J. Briegel
We show that quantum mechanical entanglement can prevail even in noisy open quantum systems at high temperature and far from thermodynamical equilibrium, despite the deteriorating…
Spin gases as microscopic models for non-Markovian decoherence
L. Hartmann, J. Calsamiglia, W. Dür +1
We analyze a microscopic decoherence model in which the total system is described as a spin gas. A spin gas consists of N classically moving particles with additional, interacting…