24 citations · 29 across the 7 of their papers we have counts for
5 papers · 1 filter
Dependence on state preparation of noise induced effects in multiqubit systems
A. C. Tzemos, D. P. K. Ghikas
The perturbation of multiqubit systems by an external noise can induce various effects like decoherence, stochastic resonance and anti-resonance, and noise-shielding. We investigat…
A new information metric and a possible higher bound for a class of measurements in the Quantum Estimation Problem
Demetris P. K. Ghikas, Fotios Oikonomou
Information metrics give lower bounds for the estimation of parameters. The Cencov-Morozova-Petz Theorem classifies the monotone quantum Fisher metrics. The optimum bound for the q…
Entangling and decohering influence of noisy perturbations. Stochastic anti-resonance in the time evolution of interacting qubits
Demetris P. K. Ghikas, Athanasios C. Tzemos
We study the entanglement evolution of two coupled qubits in interaction with an external environment and in the presence of an external magnetic field with a stochastic component.…
Quantum Entanglement dependence on bifurcations and scars in non autonomous systems. The case of Quantum Kicked Top
George Stamatiou, Demetris P. K. Ghikas
Properties related to entanglement in quantum systems, are known to be associated with distinct properties of the corresponding classical systems, as for example stability, integra…
A curvature dependent bound for entanglement change in classically chaotic systems
Demetris P. K. Ghikas, George Stamatiou
Using the Calogero-Moser model and the Nakamura equations for a multi-partite quantum system, we prove an inequality between the mean bi-partite entanglement rate of change under t…