35 citations · 36 across the 4 of their papers we have counts for
4 papers
Global quantum discord and von Neumann entropy in multipartite two-level atomic systems
M. Ibrahim, M. Usman, Khalid Khan
We have computed the global quantum discord and von Neumann entropy of multipartite two-level atomic systems interacting with a single-mode Fock field. We use Tavis-Cumming model.…
Dynamics of quantum Fisher information in a squeezed thermal bath
Asghar Ullah
In this paper, the dynamics of quantum Fisher information of a qubit interacting with a squeezed thermal environment are studied. The optimal initial state of the qubit, the temper…
Quantum renormalization group of XY model in two dimensions
M. Usman, Asif Ilyas, Khalid Khan
We investigate entanglement and quantum phase transition (QPT) in a two-dimensional Heisenberg anisotropic spin-1/2 XY model, using quantum renormalization group method (QRG) on a…
Spatial dependence of entanglement renormalization in model
M. Usman, Asif Ilyas, Khalid Khan
In this article a comparative study of the renormalization of entanglement in one, two and three dimensional space and its relation with quantum phase transition (QPT) near the cri…