2k citations · 18.4k across the 171 of their papers we have counts for
11 papers · 2 filters
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…
Quantum communication cost of preparing multipartite entanglement
Caroline Kruszynska, Simon Anders, Wolfgang Dür +1
We study the preparation and distribution of high-fidelity multi-party entangled states via noisy channels and operations. In the particular case of GHZ and cluster states, we stud…
Two-setting Bell Inequalities for Graph States
Geza Toth, Otfried Guehne, Hans J. Briegel
We present Bell inequalities for graph states with high violation of local realism. In particular, we show that there is a two-setting Bell inequality for every nontrivial graph st…
Quantum Information Processing in Disordered and Complex Quantum Systems
Aditi Sen De, Ujjwal Sen, Veronica Ahufinger +3
We investigate quantum information processing and manipulations in disordered systems of ultracold atoms and trapped ions. First, we demonstrate generation of entanglement and loca…
Standard forms of noisy quantum operations via depolarization
W. Dür, M. Hein, J. I. Cirac +1
We consider noisy, non-local unitary operations or interactions, i.e. the corresponding evolutions are described by completely positive maps or master equations of Lindblad form. W…
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…
Distillation of multipartite entanglement by complementary stabilizer measurements
Akimasa Miyake, Hans J. Briegel
We propose a scheme of multipartite entanglement distillation driven by a complementary pair of stabilizer measurements, to distill directly a wider range of states beyond the stab…
Algorithmic complexity and entanglement of quantum states
Caterina Mora, Hans Briegel
We define the algorithmic complexity of a quantum state relative to a given precision parameter, and give upper bounds for various examples of states. We also establish a connectio…
Fast simulation of stabilizer circuits using a graph state representation
Simon Anders, Hans J. Briegel
According to the Gottesman-Knill theorem, a class of quantum circuits, namely the so-called stabilizer circuits, can be simulated efficiently on a classical computer. We introduce…
Multipartite entanglement in spin chains
Otfried Guehne, Geza Toth, Hans J. Briegel
We investigate the presence of multipartite entanglement in macroscopic spin chains. We discuss the Heisenberg and the XY model and derive bounds on the internal energy for systems…
Entanglement and decoherence in spin gases
J. Calsamiglia, L. Hartmann, W. Dür +1
We study the dynamics of entanglement in spin gases. A spin gas consists of a (large) number of interacting particles whose random motion is described classically while their inter…