Enforcing nonclassicality in medium-scale quantum systems

Similar dynamics are then replicated in a macroscopic mechanical system through the use of a hybrid optomechanical system in which an atom interacts with the mechanical oscillator through an optical mode. Mechanical damping is then factored into the dynamics to examine its effect on the violation of the Leggett-Garg inequality for different parameter ranges.<br><br>The third is nonclassical correlations. Quantum discord and quantum entanglement are defined and several measures are explained.

Entanglement distribution via separable states is introduced and then built on by adding imperfections to the operations in the protocol. It is found that the protocol is still successful in spite of the errors in the operations, both when they are unitary and non-unitary. We also develop a method of generating entanglement between two bosons through mediation with two spin systems.

Through this system we demonstrate the creation of both entangled coherent states and NOON states.<br><br><br>