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6 papers · 2 filters
Non-Markovian generalization of the Lindblad theory of open quantum systems
Heinz-Peter Breuer
A systematic approach to the non-Markovian quantum dynamics of open systems is given by the projection operator techniques of nonequilibrium statistical mechanics. Combining these…
Quantum transport on two-dimensional regular graphs
Antonio Volta, Oliver Muelken, Alexander Blumen
We study the quantum-mechanical transport on two-dimensional graphs by means of continuous-time quantum walks and analyse the effect of different boundary conditions (BCs). For per…
Quantum dynamics of bosons in a double-well potential: Josephson oscillations, self-trapping and ultralong tunneling times
A. N. Salgueiro, A. F. R. de Toledo Piza, G. B. Lemos +3
The dynamics of the population imbalance of bosons in a double-well potential is investigated from the point of view of many-body quantum mechanics in the framework of the two-mode…
Optimal entanglement criterion for mixed quantum states
Heinz-Peter Breuer
We develop a strong and computationally simple entanglement criterion. The criterion is based on an elementary positive map Phi which operates on state spaces with even dimension N…
Relational interpretation of the wave function and a possible way around Bell's theorem
Thomas Filk
The famous ``spooky action at a distance'' in the EPR-szenario is shown to be a local interaction, once entanglement is interpreted as a kind of ``nearest neighbor'' relation among…
Efficiency of quantum and classical transport on graphs
Oliver Muelken, Alexander Blumen
We propose a measure to quantify the efficiency of classical and quantum mechanical transport processes on graphs. The measure only depends on the density of states (DOS), which co…