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6 papers · 2 filters
Quantum walks on complex networks with connection instabilities and community structure
Dimitris I. Tsomokos
A continuous-time quantum walk is investigated on complex networks with the characteristic property of community structure, which is shared by most real-world networks. Motivated b…
Limits on non-local correlations from the structure of the local state space
Peter Janotta, Christian Gogolin, Jonathan Barrett +1
The outcomes of measurements on entangled quantum systems can be nonlocally correlated. However, while it is easy to write down toy theories allowing arbitrary nonlocal correlation…
Information propagation for interacting particle systems
Norbert Schuch, Sarah K. Harrison, Tobias J. Osborne +1
We show that excitations of interacting quantum particles in lattice models always propagate with a finite speed of sound. Our argument is simple yet general and shows that by focu…
How much measurement independence is needed in order to demonstrate nonlocality?
Jonathan Barrett, Nicolas Gisin
If nonlocality is to be inferred from a violation of Bell's inequality, an important assumption is that the measurement settings are freely chosen by the observers, or alternativel…
Dynamics of thermalisation in small Hubbard-model systems
S. Genway, A. F. Ho, D. K. K. Lee
We study numerically the thermalisation and temporal evolution of the reduced density matrix for a two-site subsystem of a fermionic Hubbard model prepared far from equilibrium at…
Interplay of Topological Order and Spin Glassiness in the Toric Code under Random Magnetic Fields
D. I. Tsomokos, T. J. Osborne, C. Castelnovo
We analyze the toric code model in the presence of quenched disorder, which is introduced via different types of random magnetic fields. In general, close to a quantum phase transi…