Thermal quantum correlations in a two-dimensional spin star model


Bogoliubov Laboratory of Theoretical Physics

Seminar “Theory of Condensed Matter”

Date and Time: Monday, 5 September 2022, at 4:00 PM

Venue: Blokhintsev lecture hall (4th floor), Bogoliubov Laboratory of Theoretical Physics; online seminar on Zoom

Seminar topic: “Thermal quantum correlations in a two-dimensional spin star model”

Speaker: Mohammad Reza Pourkarimi (Salman Farsi University of Kazerun)


We study the thermal evolution of three types of quantum correlations under the homogeneous and inhomogeneous spin star Hamiltonian. It is shown that quantum discord is more stable than the other measures in the thermal regime, but Concurrence is more efficient when the Hamiltonian parameters are employed. However, all quantum correlations can reach their maximum, if the inhomogeneous parameter raises. Quantum correlations can be enhanced by a weak external magnetic field and strong coupling parameter. But they vanish in the case of a strong magnetic field, weak coupling parameter, and high temperatures.