Abstract
The problem of interaction falls between a two qubits and a radiation field based on PACS-PHO (Photon Added Coherent States of Pseudo-Harmonic Oscillator) without and with time-varying frequency of the field is considered in this paper. The solution with the analytic method for the wave function of the whole system is applied to describe different quantum measuring. We examine the entanglement between the quantum subsystems of the whole system by considering the qubits concurrence and qubit-field von Neumann entropy. We show the time evolution of the statistical properties of the PACS-PHO during their interaction with the two qubits. Finally, under the main physical parameters we reveal how the geometric phase of the system state can be affected and changed. Hence, according quantum mechanics this studying can open a new perspective for the experimental observation of macro realism.