Quantum correlations in non-inertial cavity systems

•Non-inertial cavities are utilized to store and send information in Quantum Information Theory.•Cavities include boundary conditions which will protect the entanglement once it has been created.•The problem is treated perturbatively and the maclaurian series are applied to expand the related Bogoliubov coefficients.•When two cavities are considered degradation in the degree of quantum correlation happens and it appears periodically.•The interesting issue is when a single cavity is studied and the degradation in quantum correlations disappears.

Non-inertial cavities are utilized to store and send Quantum Information between mode pairs. A two-cavity system is considered where one is inertial and the other accelerated in a finite time. Maclaurian series are applied to expand the related Bogoliubov coefficients and the problem is treated perturbatively. It is shown that Quantum Discord, which is a measure of quantumness of correlations, is degraded periodically. This is almost in agreement with previous results reached in accelerated systems where increment of acceleration decreases the degree of quantum correlations. As another finding of the study, it is explicitly shown that degradation of Quantum Discord disappears when the state is in a single cavity which is accelerated for a finite time. This feature makes accelerating cavities useful instruments in Quantum Information Theory.