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quant-ph2021
Dynamics of quantum discord of two coupled spin-1/2 subjected to time-dependent magnetic fields
Roberto Grimaudo, Tatiana Mihaescu, Aurelian Isar +2
We describe the dynamics of quantum discord of two interacting spin-1/2 subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for v…
quant-ph2020
Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
Iulia Ghiu, Roberto Grimaudo, Tatiana Mihaescu +2
We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The~corresponding quant…
quant-ph2020
Detecting entanglement of unknown continuous variable states with random measurements
Tatiana Mihaescu, Hermann Kampermann, Giulio Gianfelici +2
We explore the possibility of entanglement detection in continuous variable systems by entanglement witnesses based on covariance matrices, constructible from random homodyne measu…