4 papers · 1 filter
A paradigm for entanglement and information swapping of two qubits
Nasser Metwally, Mahmoud Abdel-Aty
Based on a general unitary operation of two-qubit system, we investigate the dynamics of entanglement, entropy and purity. Distinctive features in the different initial states sett…
A qualitative perspective on the dynamics of a single-Cooper-pair box with a phase-damped cavity
Mahmoud Abdel-Aty
In a recent paper Dajka, et.al., [J. Phys. A \textbf{40}, F879 (2007)] predicted that some composite systems can be entangled forever even if coupled with a thermal bath. We analyz…
A treatment of the quantum partial entropies in the atom-field interaction with a class of Schrodinger cat states
A. -S. F. Obada, H. A. Hessian, Mahmoud Abdel-Aty
This communication is an enquiry into the circumstances under which entropy and subentropy methods can give an answer to the question of quantum entanglement in the composite state…
Entanglement manipulation for mixed states in a multilevel atom interacting with a cavity field
Mahmoud Abdel-Aty, M. R. B. Wahiddin, A. -S. F. Obada
We derive an explicit formula for an entanglement measure of mixed quantum states in a multi-level atom interacting with a cavity field within the framework of the quantum mutual e…