4 papers · 1 filter
Non-Markovian decoherence and disentanglement scenarios in quantum Brownian motion
C. Hoerhammer, H. Buettner
We study the non-Markovian decoherence and disentanglement dynamics of dissipative quantum systems with special emphasis on non-Gaussian continuous variable systems. The dynamics a…
Environment-induced two-mode entanglement in quantum Brownian motion
C. Hoerhammer, H. Buettner
The time evolution of quantum correlations of entangled two-mode continuous variable states is examined in single-reservoir as well as two-reservoir models, representing noisy corr…
Polynomial invariants and Bell inequalities as entanglement measure of 4-qubit states
Jochen Endrejat, Helmut Buettner
We compare the polynomial invariants for four qubits introduced by Luque and Thibon, PRA {\bf 67}, 042303 (2003), with optimized Bell inequalities and a combination of two qubit co…
Entanglement measurement with discrete multiple coin quantum walks
Jochen Endrejat, Helmut Buettner
Within a special multi-coin quantum walk scheme we analyze the effect of the entanglement of the initial coin state. For states with a special entanglement structure it is shown th…